Rear diffuser

[Mamba52]

I'm wondering if the ACR rear diffuser will fit on a SRT or does it use a new rear bumper.
Love the look makes the rear end pure sex!!!!!!!:t1567:

[ViperSmith]

I believe the bumper, trunk, and front bumpers all have a lot of structural reinforcement to deal with the forces the diffuser and wing will put on it.

[Mamba52]

I'm wondering how much more the ACR weighs over the base? 125lbs?

[triblk6spd]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

[Rapidrezults]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

That looks so factory. Nice work Triblk!

[MBG2.0]

I'm wondering how much more the ACR weighs over the base? 125lbs?Should not be much...the carbon brakes, lighter carpet, stereo etc etc help offset the add ons

- - - Updated - - -


I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)
Looks sweet.....

[Carbon GTS]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

This looks excellent bro

[Victxv10]

Uh...Justin, that one behind the driver tire is a little off center and you know, SRT spent hours and hours in the wind tunnel testing the underbody of the new Viper. Are you sure that's not going to upset the airflow on the car????:lol2: I'm no fluid dynamics engineer, but just sayin.

Sorry man, couldn't resist hashing this again!! I found the guy on ebay you told me about and going to get some made up for mine without the cutouts.

[timberwolf]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

UMM... That looks awesome. Please share details! I love this look! Wow!

[Victxv10]

UMM... That looks awesome. Please share details! I love this look! Wow!

Call/message this guy and have them made without the logo cutout...unless you want to logo??

http://www.ebay.com/itm/Dodge-Viper-Stainless-Steel-Rear-Fin-Diffusers-/331342982200?fits=Model%3AViper&hash=item4d2594ac38&vxp=mtr

[Crotalidae]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

Very nice!!! Adds a new dimension to the car!!!

[triblk6spd]

Thanks guys. The ebay guy is super cool and the fins are really nice...
Per fin...I used two M8 X 1/4" stainless domed hex head bolts with ss washers and nylon lock nuts and I carefully riveted the rest in using stainless washers on both ends. Definitely learned a few things as I went. :)

[Space Truckin]

Very cool, it looks as though you used (5) fins?

[timberwolf]

Thanks guys. The ebay guy is super cool and the fins are really nice...
Per fin...I used two M8 X 1/4" stainless domed hex head bolts with ss washers and nylon lock nuts and I carefully riveted the rest in using stainless washers on both ends. Definitely learned a few things as I went. :)

The only thing I would want to keep in mind when installing these is the angle on the vanes. If you look at the ACR's rear vane angle, the outer ones are parallel to the ground, and the center ones are aimed slightly up. If you look at yours, it seems that the center ones are actually aimed down, which could have an adverse effect on down force. They are designed to help guide & transition the high velocity air from under the car to the non turbulent air around the car. So it basically slows the air down to avoid creating drag. With the fins angled too far down, you could actually be creating drag. Again I am no expert just observing as I attempt something similar on my car.
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[triblk6spd]

Thanks for the input. I was worried I wasn't putting my aerospace engineering / race car degree to work on this one.
The fins aren't huge by any means and I'd guess that at any speed under 100 they aren't doing much of anything other than looking cool. :)

[timberwolf]

Thanks for the input. I was worried I wasn't putting my aerospace engineering / race car degree to work on this one.
The fins aren't huge by any means and I'd guess that at any speed under 100 they aren't doing much of anything other than looking cool. :)

They are 100% effective at that! :)

[Satin69]

I like everything about that car. Great work on the diffuser

[XSTAR]

I love the mod on the GENV with these fins! I just bought some from Chris as well to replace mine. Creese1972@gmail.com if anyone needs the direct contact.

[timberwolf]

I love the mod on the GENV with these fins! I just bought some from Chris as well to replace mine. Creese1972@gmail.com if anyone needs the direct contact.

What does he charge for those fins?

[Space Truckin]

$120 for a set of (4) free shipping :slap:

[timberwolf]

$120 for a set of (4) free shipping :slap:
Pretty sweet! Thanks!

[triblk6spd]

Yup. I asked for an extra. I felt 5 looked better. :)

[V10powerr]

This is one of the best modifications I have seen so far I just sent you a PM when you get a chance please reply
Just trying to figure out the installation process

[The_Ruski_Driver]

The only thing I would want to keep in mind when installing these is the angle on the vanes. If you look at the ACR's rear vane angle, the outer ones are parallel to the ground, and the center ones are aimed slightly up. If you look at yours, it seems that the center ones are actually aimed down, which could have an adverse effect on down force. They are designed to help guide & transition the high velocity air from under the car to the non turbulent air around the car. So it basically slows the air down to avoid creating drag. With the fins angled too far down, you could actually be creating drag. Again I am no expert just observing as I attempt something similar on my car.
10667
10668

It seems the outer ones are a bit taller than the inside ones, although it def looks better than no diffuser at all. Considering doing this, any updates on how they are holding up OP?

[98intrigue]

It seems the outer ones are a bit taller than the inside ones, although it def looks better than no diffuser at all. Considering doing this, any updates on how they are holding up OP?

I have them installed on my car as well. All the blades are the same dimensions, but the outside blades you mentioned look "taller" because of the shape of the OEM diffuser. No issues with the quality of them.

[Jack B]

The lower they go the better they work. The problem on the non-ACR cars is that the bottom panel is not flat. The key to getting them to work effectively is to make sure they fan out, in other words, the opening to the front should be smaller than the rear opening for any two fins. If you are not going 140, who cares if they work, they still look good.


It seems the outer ones are a bit taller than the inside ones, although it def looks better than no diffuser at all. Considering doing this, any updates on how they are holding up OP?

[steve911]

The rear valance panel from the ACR will bolt up to a non ACR rear bumper cover. That valance comes with the Riv-nuts installed. You cannot put ACR Strakes on a non ACR valance because of its shape.

[Policy Limits]

New rear diffuser looks so boss. I realize it's an extremely functional component but hafta agree on aesthetic value it adds back there. Looks very aggressive

[acrgt]

timber any more pics of your car love the black stripes . thinking opf doing the same on mine

[The_Ruski_Driver]

The lower they go the better they work. The problem on the non-ACR cars is that the bottom panel is not flat. The key to getting them to work effectively is to make sure they fan out, in other words, the opening to the front should be smaller than the rear opening for any two fins. If you are not going 140, who cares if they work, they still look good.

I'm going much more than 140... so yes, I am trying to figure out if it's going to help or hurt before drilling the rear valence.

[Jack B]

That was my point, if you want to go fast, make sure you align them correctly otherwise, thry might create positive pressure, versus, negative pressure.


I'm going much more than 140... so yes, I am trying to figure out if it's going to help or hurt before drilling the rear valence.

[Eddieg]

That was my point, if you want to go fast, make sure you align them correctly otherwise, thry might create positive pressure, versus, negative pressure.


Installing these today. Is there a way you can put some pictures of how the look installed so I can get a good idea as to what to do? Thank you.

[Eddieg]

I did my own diffuser using a Gen IV diffuser kit off ebay. Looks fantastic.
http://i1383.photobucket.com/albums/ah287/justin51/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg (http://s1383.photobucket.com/user/justin51/media/Mobile%20Uploads/2015-05/FB_IMG_1431664418993-01_zps2f4rjpv9.jpeg.html)

Got the same kit. Guy was really cool. Do you have some more detailed pics or instructions for installing these. Trying to tackle it today and want to make sure I do it correctly. I got the 6 blade kit

[8400cc]

Pretty sure extreme offers a kit for an ACR rear diffuser for non ACR cars. Also thought one of the Dubai vendors was working on an aftermarket option for those that want something very close to stock parts. I will be hunting down this stuff for myself next season.

[imzoomintoo]

Extreme has a kit however it runs about $5000, about the same as OEM parts but it is my understanding that it mounts up to your existing rear valance panel. you can see it on Crotalidae's car here,

https://driveviper.com/forums/threads/15150-Viper-Gen-V-canards-Need-ur-opinion!/page2?highlight=rear+diffuser

you can also see what SilveRT8 did with the ebay diffuser strakes from a gen 4 for about $250

[Jack B]

Extreme has a kit however it runs about $5000 about the same as OEM parts but it is my understanding that it mounts up to your existing rear valance panel. you can see it on Crotalidae's car here,

https://driveviper.com/forums/threads/15150-Viper-Gen-V-canards-Need-ur-opinion!/page2?highlight=rear+diffuser

you can also see what SilveRT8 did with the ebay diffuser strakes from a gen 4 for about $250

I did the same, (Ebay), do a search, I show them on the lift.

[PR-GTS]

So finally, after you guys tested it, did somebody went above 140mph and noticed any difference in the behavior of the car? Mine is a Twin Turbo, so I'll reach 140mph and high speed a lot and pretty fast. I ordered them but I haven't installed them. What do you guys think I should do?

[Matt Dillon]

Extreme has a kit however it runs about $5000, about the same as OEM parts but it is my understanding that it mounts up to your existing rear valance panel. you can see it on Crotalidae's car here,

https://driveviper.com/forums/threads/15150-Viper-Gen-V-canards-Need-ur-opinion!/page2?highlight=rear+diffuser

you can also see what SilveRT8 did with the ebay diffuser strakes from a gen 4 for about $250

WOW, IF Extreme's kit is 5k just WOW! How or WHY would anybody pay that price? SMDH

[8400cc]

WOW, IF Extreme's kit is 5k just WOW! How or WHY would anybody pay that price? SMDH

From what i know, Extremes is a very close repmica of the factory diffuser, alot of engineering and likely wind tunnel testing goes into these parts, the proper chanelling of high pressure to low in these diffusers allows for some serious low drag downforce. $300 fins are not going to achieve the same thing, i dow however admit they look good, but nowhere as good as the factory or the extreme.

[Matt Dillon]

From what i know, Extremes is a very close repmica of the factory diffuser, alot of engineering and likely wind tunnel testing goes into these parts, the proper chanelling of high pressure to low in these diffusers allows for some serious low drag downforce. $300 fins are not going to achieve the same thing, i dow however admit they look good, but nowhere as good as the factory or the extreme.

Well that makes a lot more sense, especially if you're going to get to the speeds that i'll probably never do! Thanks

[SSGNRDZ_28]

The Xtreme kit includes all hardware, drilling templates, and strakes which are not included in the OEM price (and no drilling template would be available). They are an exact replica of the ACR Extreme OEM diffuser.

[Crotalidae]

The Xtreme kit includes all hardware, drilling templates, and strakes which are not included in the OEM price (and no drilling template would be available). They are an exact replica of the ACR Extreme OEM diffuser.

Great product they offer!!! I've received nothing but good compliments & it completes the rear of the car in my opinion!!!

[Viper_oman]

any instruction on how to fit those fins. great looking car btw

[Meteoro]

44555

[Meteoro]

44557

[USAFPILOT]

44557 that kit looks nice...which one is it?

[BJG32]

I make this kit

44575

[Meteoro]

that kit looks nice...which one is it?

it is my own design, been playing with carbon fiber since the 90s, did it with 7 blades instead of the 6, all CF