Hi-Flow Cats

[BJG32]

Can anyone tell me if there are any bolt on hi-flow cats available for the Gen 5? If so does anybody sell them? JonB does not have anything before anyone suggests asking him.

I have a white GTS. I want to keep the stock headers. I am just looking to replace to the stock cats in my car to hopefully cool the exhaust down before the paint yellows near the area that covers the cats.

thanks...

[JonB ~ PartsRack]

Thanks For Asking!

If someone would kindly LOAN me (or sell me) their Take-OFF Gen 5 cats, I can make bolt-in HF replacements in a couple weeks.

JonB@PartsRack.com

[BJG32]

Thanks For Asking!

If someone would kindly LOAN me (or sell me) their Take-OFF Gen 5 cats, I can make bolt-in HF replacements in a couple weeks.

JonB@PartsRack.com



Thanks Jon...I'll be watching the forums for if/when this becomes available.... or you can just email me at my email if you still have it. I do have stock cats from a Gen3 I could lend, but my guess is they are not the same thing!?

... THANKS!

[Mazak]

Can anyone tell me if there are any bolt on hi-flow cats available for the Gen 5? If so does anybody sell them? JonB does not have anything before anyone suggests asking him.

I have a white GTS. I want to keep the stock headers. I am just looking to replace to the stock cats in my car to hopefully cool the exhaust down before the paint yellows near the area that covers the cats.

thanks...

I am interested too.

[Bruce H.]

Thanks For Asking!

If someone would kindly LOAN me (or sell me) their Take-OFF Gen 5 cats, I can make bolt-in HF replacements in a couple weeks.

JonB@PartsRack.com



I haven't looked at the system at all, but could test pipes be used to eliminate the cats and then swap them back in for emissions testing? My current thinking is I really don't want to do headers or anything that would make periodic testing a painful or expensive exercise for the sake of another 20 hp on top of what the Arrow PCM alone would give me.

[BJG32]

I haven't looked at the system at all, but could test pipes be used to eliminate the cats and then swap them back in for emissions testing? My current thinking is I really don't want to do headers or anything that would make periodic testing a painful or expensive exercise for the sake of another 20 hp on top of what the Arrow PCM alone would give me.

I believe that is right, but I believe you'll also get a CEL without cats. I am not interested in changing out cats every 2 years or smelling like gas. Hi-flo is what I want... Something I can easily swap if I have a warranty issue.

[Bruce H.]

I believe that is right, but I believe you'll also get a CEL without cats. I am not interested in changing out cats every 2 years or smelling like gas. Hi-flo is what I want... Something I can easily swap if I have a warranty issue.

No CEL with Arrow PCM:)

[yellowmz3]

I too am interested

[GTViper]

also interested

[DPViper]

Also interested. Aren't the Gen 4 and Gen 5 cats the same?

[BJG32]

Also interested. Aren't the Gen 4 and Gen 5 cats the same?

Different part numbers, but they look the same. Not sure......

[Steve M]

Also interested. Aren't the Gen 4 and Gen 5 cats the same?

I don't think so...the Gen 5 used a higher flow OEM cat from what I remember reading, and I know for headers at least, the turn-outs were slightly different (enough different that header manufacturers had to make tweaks to the design).

[Martin]

No CEL with Arrow PCM:)

Will the Arrow PCM pass muster with the smog guys? I know that the Mopar PCM on the Gen IV definitely did not...

[Steve M]

Will the Arrow PCM pass muster with the smog guys? I know that the Mopar PCM on the Gen IV definitely did not...

It'll be the same for that as well...it won't pass the readiness test for the same reason the Gen 4s would fail - no rear O2 sensors.

[JonB ~ PartsRack]

Also interested. Aren't the Gen 4 and Gen 5 cats the same?

Nope. NOT interchangeable.

[SammutRacing]

Can anyone tell me if there are any bolt on hi-flow cats available for the Gen 5? If so does anybody sell them? JonB does not have anything before anyone suggests asking him.

I have a white GTS. I want to keep the stock headers. I am just looking to replace to the stock cats in my car to hopefully cool the exhaust down before the paint yellows near the area that covers the cats.

thanks...

I was looking for the same thing.. had random tech to corsa race on my gen 4 and loved the sound, for gen 5 all I could find for a high flow with keeping the stock header is below.. not sure if you will have a CEL issue though.. would love to hear feed back from people running this set up..

http://www.vividracing.com/catalog/-p-150771811.html?utm_source=adwordsfroogle&utm_campaign=adwordsfroogle&utm_content=188710&ph=1&gclid=COyp387lvsQCFdgDgQodX6IACQ

[yellowmz3]

I want to resurrect this post : has anyone found/tried a bolt on system post-headers?

[BJG32]

Nothing yet yellowmz3.... I'm waiting for somebody to give JonB their stock cats so he can get hiflows fabricated. I know several have them laying around....just nobody (as of yet) motivated enough to help us out!! I've been watching ebay and classifieds....

[ViperGeorge]

I will have a set of stock cats available once my new car gets here. I'd be happy to send them to JonB for fabrication of high flows.

[FSTENUF]

Jon has always done right by me. I have a set off of my gen V. If Jon needs me to loan him my set to help out not a problem just PM me and we can set up the shipping.

[Ninjakris]

Random Technology has a set of Gen V cat's currently and "should" have the first high flow prototype set in a few weeks. I live very close to Random Technology and have been talking to JonB about testing the first set on my car for fitment and that kind of stuff. I had a set of their high flow's on my 06' and was very happy with the quality. If/when anything progresses, I'll update this thread or just make a new one.

[ViperGeorge]

Jon B now has a set. He apparently got them Monday from someone.

[BJG32]

Sweet! I'm excited to hear this. Thanks to all the great members willing to lend a hand! ....and of course JonB for making things happen.

[BJG32]

Random Technology has a set of Gen V cat's currently and "should" have the first high flow prototype set in a few weeks. I live very close to Random Technology and have been talking to JonB about testing the first set on my car for fitment and that kind of stuff. I had a set of their high flow's on my 06' and was very happy with the quality. If/when anything progresses, I'll update this thread or just make a new one.

Hey NinjaKris....pretty sure I am the guy who bought those used off you for my Gen3! They worked out great for me too.... Love the added sound.

[yellowmz3]

Great news guys. Please keep us posted!!

[G37Sam]

I wonder if high flow cats will reduce the in-cabin heat.

[Sybil TF]

Still got cabin heat on a gen 5? I figured it would be a lot less by now.

[cashcorn]

I noticed a big difference from stock to Belanger's/Hi flows. Lower cabin temps for sure..

[JonB ~ PartsRack]

Vendors working together: I offered to buy, but Mark J loaned me a set, and sent them to Random Tech, Thanks.

Initial measurements have been made, and a jig-form being built. We have a mule-car volunteer to drop-by as/if needed for a test fit, and SHOULD be able to take orders by early May. Both Ceramic or SHF Metal Honeycomb will be produced, and YES! Telemetry of G3 and G4 toe-boxes showed and external temp drop of 150f with HF Metals..... -135f lower temps with Ceramics. Sidesills down by 130f.

Flex-Pipe section is a restriction, and a monetary cost that Belanger and M+M have proven is not needed. So we wont have one either.

Getting Close ! JonB@PartsRack.com

[viper04]

Nice Jon, Please keep us posted.

[BJG32]

JonB i want the first set for sale....you have my deposit! :cool:

[yellowmz3]

I'm in too

[JonB ~ PartsRack]

So far and in order we have KR, GT, BG, and 'Yellowmz3' [who I cannot ID]. Eme your tru name? JonB@PartsRack.com

[Sainthitch]

I am in for this! Please let me know if you need a deposit.

[DPViper]

Great news....price?

[DPViper]

Any update?

[BJG32]

Hey JonB...what's the word? Gotta price and availability date?

[JonB ~ PartsRack]

The FIRST SET is in the hands of a G5 guy for test-fitting this weekend. The SRT prices on our website closely reflect the G5 HF Cat prices.
From $639-$679 per pair, 2.5" vs 3" vs Ceramic vs SHF Metal Honeycomb.

[Orange TA]

I'm confused by this thread. Doesn't the Gen V already come with high flow cats from the factory? This was one of the contributing factors towards the 640 HP number vs the Gen IV's 600 HP. It might also explain why guys are only picking up 5-7whp with aftermarket headers and high flow cats.

[BJG32]

I believe they again have a primary and secondary cat just like the gen 3/4. I am not sure what the purpose of the secondary cat is and why dodge included it!? There is no o2 sensor behind the second cat.

JonB reported his version results in side sills 130 degrees cooler than OEM. That's far from OEM being hi-flow!

White owners are having trouble keeping the paint from browning...

The new version will:
Save paint from browning
Small Increase in horsepower
Exhaust note will sound even cooler/louder.
Keep your wife's legs from getting burned

This one is a no brainer........

Don't take my word for it, but I believe you can gut your secondary cat and have similar results, but I prefer to keep them in tact in case of a warranty issues.

[JonB ~ PartsRack]

Yeah, you would not want to buy G5 HF Cats just for the small HP gain. BJG cited the menu of reasons to opt for HF cats. And "Cool" is one of those homonyms meaning completely different things, but Both apply here!

The footwell-sill temps run 125-150f cooler depending on diameter and substrate.

[yellowmz3]

JonB, please keep us informed on the G5 test guys results. We're all ready!
Thanks

[DPViper]

Any news on the high flow cats?

[BJG32]

This is getting worse then the targa top photo updates! Kidding jonB! When can we order our cats!? Just say when!!!

[JonB ~ PartsRack]

Our TEST MULE Gen 5 kit was installed this past weekend, and we were a bit disappointed to hear that we missed the mark by about 1.5" of outlet length, a SIMPLE issue. Random tech is now modifying their jig by that increment and we should have customer product in 10-14 days.

Any FIRM Orders please to JonB@PartsRack.com

[BJG32]

JonB im firm. Will email you. THANKS!

[vegasgtr]

Are saying this mod on the Gen V will give you cooler temps where the exhaust ends..I.E no more buying your leg ? My car is also white, hoping that does not change color. My exhaust runs Super hot in Vegas.

[BJG32]

Are saying this mod on the Gen V will give you cooler temps where the exhaust ends..I.E no more buying your leg ? My car is also white, hoping that does not change color. My exhaust runs Super hot in Vegas.

yes! Still waiting to hear from Jon on the date these will be available.....

[cayenne]

Jon,
Are these bolt-in (clamps) or weld in? Will they work with both OEM and aftermarket exhaust?

[cayenne]

Ooops! Dupe posting

[JonB ~ PartsRack]

Jon,
Are these bolt-in (clamps) or weld in? Will they work with both OEM and aftermarket exhaust?


BOLT IN, and have the option of OE fit or 3" fit. Present lead time is 8-10 days.

[JonB ~ PartsRack]

Are saying this mod on the Gen V will give you cooler temps where the exhaust ends..I.E no more buying your leg ? My car is also white, hoping that does not change color. My exhaust runs Super hot in Vegas.




The toe-box and forward 1/3 of the side sill cool off by 150f degrees. Installing any performance cat-back or replacement h-flow muffler-resonator cools the rear 2/3 of the sill. Tested Example: Corsa drops 130f.

[DZnutz]

Can I bolt these in from underneath without removing the sills?

[viper04]

Can I bolt these in from underneath without removing the sills?
I would say no!.

[BJG32]

I would say no!.

correct ^^

JonB...what's the latest?

[ViperTony]

BOLT IN, and have the option of OE fit or 3" fit. Present lead time is 8-10 days.

Jon, I'm seriously interested in a set. Let me know when these are ready.

[DZnutz]

update please

[Viktimize]

I'll be needing a set of 2.5" as well.

[DZnutz]

Are these ready to be ordered? photos?

[cayenne]

Man, this has gone completely quiet :-(

I want to upgrade my exhaust but waiting to order the Corsa until these are available so I can kill two birds with one stone!

[DZnutz]

they are available now... call jonb

[BJG32]

they are available now... call jonb

My white paint yellow'd so I missed the boat on my main concern....almost pulled the trigger on headers/cat so I can get the problem resolved and repainted. Glad you posted.... i'm contacting JonB!

[donk_316]

Who makes "test pipes" for the G5? Can't find them

[DZnutz]

^ no one... if you want contact JonB and have him try to order a catpipe section from random tech without any cats. im sure its possible

[sambo32]

Would these hi-flow cats installed be able to pass the yearly New York State inspection.

[mblgjr]

I just want to know how much the HF cats gain by themselves vs. headers/hi-flow combos.

[JonB ~ PartsRack]

Man, this has gone completely quiet :-(

I want to upgrade my exhaust but waiting to order the Corsa until these are available so I can kill two birds with one stone!

Package Deal $1750

[JonB ~ PartsRack]

I just want to know how much the HF cats gain by themselves vs. headers/hi-flow combos.

I could make up a story on how much HP a Gen 5 gains with our HF cats alone, but truth is, we have NOT dynoed a set and have no plans to do so. Why? a floor dyno is +/- 2% accurate cannot prove +10HP on a 645 HP motor! Instinct and experience says you pick up 7-10 HP

DO the cats for 2 reasons: COOL TEMPS: 150f cooler toe box and front sill; SOUND: Louder, Deeper Tone.

[JonB ~ PartsRack]

Would these hi-flow cats installed be able to pass the yearly New York State inspection.

They pass a sniffer test even in CA

[JonB ~ PartsRack]

Those 6 of you that DID pre-order: Random Tech says they plan to ship beginning Friday 7/31. Thank You for your patience, assuming you WERE patient !

[vegasgtr]

Jon ! don't forget me !!

I want the highest flowing one. 699?

[sambo32]

Jon, I will be calling you this week to place the order.
Thank You

[ddominator1]

I'm In too. Group buy? Pricing.? Jon can u pm me?

[JonB ~ PartsRack]

Jon ! don't forget me !!

I want the highest flowing one. 699?

Yes, SHF Metal Honeycombs $699/pair. Building Metal orders this week, ceramic orders have all shipped and we have a couple pairs in stock for immediate shipping. Sold at the same prices as G3-4, despite the R+D.



PS: There are not enough character spaces in this message to describe how much I hate Group Buys and their problems, issues, delays, and extra work. More like Group Byes, Lies, Dies. It is MORE work than making separate sales! They change like an amoeba, and never reach their target goal. I could charge MORE for the guaranteed futility. The first time I ever said the words "bad garage" was in 2004 after a 3rd failed promise of group buys from a newbeee garage... Sheeesh, a nightmare.

[SRT BILL]

Hey Jon, could you give a brief description of the differences between ceramic and metal hi flow cats. My gen V is bone stock and now with about 1600 miles on it I'm looking at some of the things different members have been doing. Getting the sills cooler is important along with a deeper note. Thanks..

Bill

[Doug Nash]

Hi Jon,
Sorry you're having trouble with follow through. Two questions. Can I install myself in the garage. And are there any consequences to throwing codes, etc due to exhaust temp changes. Dont know where the sensors are. Sure would like to cool the sills. 3m has crinkled on one sill from the heat.
Thanks in advance for the answers.
Doug Nash

[BJG32]

Hi Jon,
Sorry you're having trouble with follow through. Two questions. Can I install myself in the garage. And are there any consequences to throwing codes, etc due to exhaust temp changes. Dont know where the sensors are. Sure would like to cool the sills. 3m has crinkled on one sill from the heat.
Thanks in advance for the answers.
Doug Nash

Yes you can install in your garage with tools 99% of home garages already have. These just bolt on to the stock headers and exhaust. If they work like any other Hi-flow it will not throw codes. These will cool sills significantly.

[Doug Nash]

BJG32,

Do the sills have to come off? Or can they be installed from underneath completely. Should have looked around more when I changed the oil. I am traveling or I'd crawl under!

[Steve M]

Hi Jon,
Sorry you're having trouble with follow through. Two questions. Can I install myself in the garage. And are there any consequences to throwing codes, etc due to exhaust temp changes. Dont know where the sensors are.

You could throw a code or two, but it wouldn't be related to the exhaust temp changes. There's an oxygen sensor before the catalytic converter in the exhaust manifold collector that measures the fuel/air content after combustion (this is used to maintain stoich at idle and part throttle, but is not used at WOT due to the sensor type used in this application), and one after the catalytic converter that determines whether or not the converters are working properly. If anything gets thrown, it would be related to the second oxygen sensor after the cats.

There is an algorithm used by the PCM to estimate catalytic converter temps, but I'm unsure what goes into this calculation or how accurate it is. I'm guessing the model is based on a stock converter, so putting in a different converter with a different substrate (cells/in and material type) would likely be something the stock PCM would have no way of knowing unless the O2 sensor readings are somehow used in the calculation.

[lmcgrew79]

Waiting on mine to get here and will dyno after to see what they gain, it was pretty significant on my gen 4 with the pcm.

[98intrigue]

Hi Jon,
Sorry you're having trouble with follow through. Two questions. Can I install myself in the garage. And are there any consequences to throwing codes, etc due to exhaust temp changes. Dont know where the sensors are. Sure would like to cool the sills. 3m has crinkled on one sill from the heat.
Thanks in advance for the answers.
Doug Nash
Mine has done so as well. I reached out to 3M by email this morning and this was their reply. Have you reached out to them yet? I'm going to call later today to see if this is something they will warranty.

"For warranty information request, please call the 3M Warranty Group for Scotchgard Paint Protection Film at 800-643-0955. They can help you with warranty."

[BJG32]

BJG32,

Do the sills have to come off? Or can they be installed from underneath completely. Should have looked around more when I changed the oil. I am traveling or I'd crawl under!

Sills will have to come off. It would be best to have a friend help guide when you put it back on, but I've taken sills off by myself without issue.

[BJG32]

Waiting on mine to get here and will dyno after to see what they gain, it was pretty significant on my gen 4 with the pcm.

Do you currently have a PCM? Do you have OEM cat back?

My only change will be the cats. If you match that I am curious to see your before/after results.

[AZTVR]

Sure would like to cool the sills. 3m has crinkled on one sill from the heat.


Mine has done so as well. I reached out to 3M by email this morning and this was their reply. Have you reached out to them yet? I'm going to call later today to see if this is something they will warranty.

It might help ( or hurt) your case if you know what temperature your side sills are getting to. The 3M tech sheet does not mention a maximum temperature specification; but it does list their test conditions. The Pro Series 3M film is tested 168 hours at 80°C/176°F for aging/yellowing.

[BJG32]

I installed the passenger side last night. It took about 2.5 hours. I will install driver side tonight. If anyone has questions or needs a photo let me know now!

If you can turn a wrench you can do this install by yourself.

Tips:

-To remove the v band (connects cats to header) I highly recommend a pass-thru socket set. Otherwise it will take an hour and a very tired arm to remove.

-You'll need a rubber mallet to remove and install the exhaust onto the header. It will take a lot of good swings to get it on and off.

-Take a photo of the exhaust tip before you remove the sill. Then once your remove your side sill take a photo of the exhaust tip and mark its location relative to the car. You'll need the tip in the same spot and angle after install. Test fit the sill and make sure you not the location of the exhaust before you start installing bolts again.

-The new cats are a very snug fit onto the header. I had to heat the cat tip with a torch and and use some elbow grease to get it close enough to let the vband do its work.

-All bolts/screws to remove side sill are exposed except 2 nuts behind the panel in the area circled below. You have to remove the rear wheel and peel back the rear wheel well liner to access to nuts and remove the bolts they are connected too. The 2 bolts are connected together so you only need a 10mm socket to remove.

12399

[vegasgtr]

still waiting on mine.. i will pay someone to do it. No lift.

[BJG32]

still waiting on mine.. i will pay someone to do it. No lift.

You don't need a lift. Jack stands and safety precautions is all I used. Plenty of room.

[DPViper]

Eager to hear what you think....

[vegasgtr]

You don't need a lift. Jack stands and safety precautions is all I used. Plenty of room.


for 200$ , I rather not die knowing my self.lol

[BJG32]

for 200$ , I rather not die knowing my self.lol

If it was only $200 I'd do the same. No way that will be the labor cost. You have to remove panels. 6 man hours of labor is what you'll be charged.

[BJG32]

Eager to hear what you think....

I'll know tonight! Mine are ceramic. Just doing one it is noticeably A LOT louder. Metal is supposed to be louder than Ceramic.... you may want to think twice about metal!

[sambo32]

Doing my Hi-Flow cats install tomorrow, do I need to go out and buy a torch. I just don't want to be stuck with out one in the middle of the install. Also did yours come with exhaust hangers, mine did not.

[GTViper]

I tried installing mine in my garage with stands and jack after 2+ hours got stuck on the last part -removing the stock cat from the headers. Up to that point all went smooth but pulling back and forth trying to remove it from the headers I could feel just enough movement of the car to make me nervous.. No thanks, I put it back together and taking it to the dealer. Cost will run me around $300 per side which as far as I'm concerned worth it!

[vegasgtr]

If it was only $200 I'd do the same. No way that will be the labor cost. You have to remove panels. 6 man hours of labor is what you'll be charged.

shit,well 400$ i am in. lets see when i get it what they charge.

[BJG32]

Doing my Hi-Flow cats install tomorrow, do I need to go out and buy a torch. I just don't want to be stuck with out one in the middle of the install. Also did yours come with exhaust hangers, mine did not.

Second side went on smoother but i still heated it. Id buy a torch...take it back if you dont need it. No hangers on mine. Do NOT start your car before install put it in its spot tonight so its cold tomorrow. The v bands gtviper likley had trouble with need to be knocked loose with a screw driver and hammer after you loosen the vband nut. Its 'glued' on from the heat. Removing the cat takes no effort once v band is off. If the car is shaking your doing it wrong!

[BJG32]

By the way the car sounds amazing!!!! And sills are noticably cooler. If you have never done hiflows before you are in for a treat! Car is only LOUD ehen you want it to be....and it SCREAMS during WOT!

If you think your car turns heads now....JUST WAIT!

THANKS JONB FOR MAKING THIS PART HAPPEN!!!!

[BJG32]

No codes by the way....

[sambo32]

Yes, thank you JONB. These cats are very nice quality. BJG32, thank you for the info on the install and I will be contacting you in regards to my center caps.

[vegasgtr]

By the way the car sounds amazing!!!! And sills are noticably cooler. If you have never done hiflows before you are in for a treat! Car is only LOUD ehen you want it to be....and it SCREAMS during WOT!

If you think your car turns heads now....JUST WAIT!

THANKS JONB FOR MAKING THIS PART HAPPEN!!!!


can't wait to get mine ! did it feel like you gained some power ?

[BJG32]

can't wait to get mine ! did it feel like you gained some power ?

It could have lost power and id say yes. The sound makes it feel faster! Its probably a 10 hp gain which is hardly noticable on this car. It felt stronger, but i was more enjoying the music of the new exhaust note. Shifting through gears is twice as fun now!

[DPViper]

What about drone? Can you compare the sound to a car with headers? Wish I lived close to you so I could hear in person. Thanks

[BJG32]

What about drone? Can you compare the sound to a car with headers? Wish I lived close to you so I could hear in person. Thanks

Zero drone. Just drove to work with hwy miles.

[BJG32]

Hey Jon, could you give a brief description of the differences between ceramic and metal hi flow cats. My gen V is bone stock and now with about 1600 miles on it I'm looking at some of the things different members have been doing. Getting the sills cooler is important along with a deeper note. Thanks..

Bill

I'll answer for JonB. SHF Honeycomb Metal Substrate are cooler and LOUDER and $60 more than ceramic, best for S/C Vipers.

[vegasgtr]

I'll answer for JonB. SHF Honeycomb Metal Substrate are cooler and LOUDER and $60 more than ceramic, best for S/C Vipers.

so which is the highest flowing cats?

[BJG32]

so which is the highest flowing cats?

Don't quote me but I believe the honeycomb is. I believe it has larger 'flow chambers'. Also since it runs cooler than ceramic this also tells me it flows better.

[Steve M]

so which is the highest flowing cats?

Metal substrate should flow the most, but I have no idea how much of a difference it would make over ceramics HP-wise.

I'm batting around this idea myself for my Gen 4 - I love how quiet the stock exhaust is, and while I can tolerate a little more volume, I don't want to end up hating my car because of it. I'm leaning heavily towards the ceramics at this point...really all I'm after is the ability to add a pre-cat bung so I can run a wideband. Can't really do that with the stock flex joint in place. I'm curious if bungs are something Jon can add prior to shipping...

[BJG32]

Metal substrate should flow the most, but I have no idea how much of a difference it would make over ceramics HP-wise.

I'm batting around this idea myself for my Gen 4 - I love how quiet the stock exhaust is, and while I can tolerate a little more volume, I don't want to end up hating my car because of it. I'm leaning heavily towards the ceramics at this point...really all I'm after is the ability to add a pre-cat bung so I can run a wideband. Can't really do that with the stock flex joint in place. I'm curious if bungs are something Jon can add prior to shipping...

I had hiflows on my Gen 3 vert. It was louder, but not out of control. No drone.

[sambo32]

Quick question, did you remove the muffler along with the factory cats. It looks like thats the only way they are coming out and going in.

[sambo32]

I figured it out, drivers side factory cats with muffler are off.

[BJG32]

I figured it out, drivers side factory cats with muffler are off.

You got it!

[DPViper]

Any more feedback on these? Thanks

[JonB ~ PartsRack]

By the way the car sounds amazing!!!! And sills are noticably cooler. If you have never done hiflows before you are in for a treat! Car is only LOUD ehen you want it to be....and it SCREAMS during WOT!

If you think your car turns heads now....JUST WAIT!

THANKS JONB FOR MAKING THIS PART HAPPEN!!!!


Thanks BEN for the generous sharing of DIY Info (again) and for answering the questions that I was not available to see.

BEST WAY to reach me is JonB@PartsRack.com or PartsRack@aol.com.
Doug, : Worst way to reach me is posting on forums!

[Note To Self: Be careful what you wish for!! I wished that the VPA was not competing with me for 3 years, and by buying the company I got my wish. But running 2 websites leaves LITTLE time to dabble on forums as I have enjoyed the past 18 years. Add to that the extreme fire situation just 4-7 miles from here, and me being a FD-4 Auxiliary volunteer, Im out of the office in 2-5 biz hours / day helping with fire equipment support gruntwork. ]

[BJG32]

Just talked to JonB and one owner was having trouble with the install. As I mentioned above the fit from exhaust manifold to cat is very tight. If you are installing yourself you have to heat the cat with a torch and install on 100% cold car. If you drive to a muffler shop etc. they will likely have to run some water over the exhaust manifold to cool it enough to shrink. Apparently a Dodge dealer is doing an install and could figure this out on their own... Feel free to message me if you need any help!

One more tip I forgot. The exhaust will "grow" when hot. It pushes back towards the rear by about 1" once hot. So make sure the exhaust tip is placed correctly in the sill outlet or it will rub against the sill outlet. That is why the photos aforementioned on Page 4 are important to take on a cold car.

[JonB ~ PartsRack]

so which is the highest flowing cats?


Both Ceramic and Metal Honeycomb flow more than stock, and run far cooler, and louder. Metals have a higher pitch-tone than ceramics.

SHF Metal Honeycomb cats are CAPABLE of flowing more CFM than ceramics, IF your modified intake, heads and headers are producing it! Ceramics are capable of flowing more CFM than the OE motor produces. So choosing Metal Honeycomb nets less restriction, more decibels s, and a bit cooler sills than even the cool Ceramics.

In other words: If you hook a fire hose up to your garden hose tap, it wont create more flow just because it is capable of flowing more.... That is the flaw of the 'catless myth' too!

[dewilmoth]

Now that these have been used for a while can anyone with experience say whether there’s any CEL issues? If so, is there any correlation between CELs and the two substrate material options? Lastly, any rattle with the stock muffler since the flex section is removed? Thanks for the help, I have a white car and would like to come up with a good solution for the heat with an added benefit of improved sound.

[Steve M]

Now that these have been used for a while can anyone with experience say whether there’s any CEL issues? If so, is there any correlation between CELs and the two substrate material options? Lastly, any rattle with the stock muffler since the flex section is removed? Thanks for the help, I have a white car and would like to come up with a good solution for the heat with an added benefit of improved sound.

I've had the metallic high flows on my Gen 4 for quite a while now - it is most definitely louder at WOT (I'd say about 3 dB), but cruising is still pretty tame. I did get a CEL, but I've got HPTuners, so I just turned off the codes. No rattles, no drone. I can't say that the car runs substantially cooler, but it's at least a little cooler. The biggest benefit to me was being able to add an additional bung pre-cat so I could run a wideband O2 sensor full time...that made WOT tuning a breeze, and incredibly consistent. Just don't mention that to Lou Belanger, or you'll get called an idiot.

[ViperTony]

Now that these have been used for a while can anyone with experience say whether there’s any CEL issues? If so, is there any correlation between CELs and the two substrate material options? Lastly, any rattle with the stock muffler since the flex section is removed? Thanks for the help, I have a white car and would like to come up with a good solution for the heat with an added benefit of improved sound.

3,300 miles and no CELs here with HFs.

[ForTehNguyen]

been using the HF cats that came with the belanger system, no CEL

[dewilmoth]

3,300 miles and no CELs here with HFs.


been using the HF cats that came with the belanger system, no CEL

Ceramic or metallic?

[ForTehNguyen]

no idea what came with it. I remember looking at the cats and they were a light tan color if that means anything

[dewilmoth]

no idea what came with it. I remember looking at the cats and they were a light tan color if that means anything

If you didn’t request and pay extra for metallic I’m assuming they’re ceramic.

[ViperTony]

Ceramic or metallic?

Metallic and also using them as part of the belanger catback.