Quote Originally Posted by Scott_in_fl View Post
^^^ There are modifications, and there are modifications. The Arrow HC kits and 9L kits are going to be highly regarded because they are as close to OEM spec, design, testing, tuning, etc. as you will get. If you are worried about future value, these are the only mods I would consider.

That said, modding a '17 ACR-E, especially an SE car or other highly desired spec, is taking a larger gamble because the cars are potentially collector-worthy and most collectors want a bone stock car at auction time (with little to no miles). Thus, if your endgame is maintaining the highest possible value, you really need to not drive it anyway -- so why mod it?

Now, I think these kits make far more sense on a car that already has miles anyway. Or, say a '16 ACR with standard colors. Those cars do not stand out for their stock spec, but might actually stand out (and be more desirable) because of an awesome Arrow upgrade like the 9L.

I'm caught in the middle. I have a great stock spec on a final year car, but I plan on driving the wheels off the thing and never selling it. So, I like the idea of the 9L and my only real concerns are long-term reliability and parts availability.
Well Prefix is not going anywhere. Plus I would think the fixed cam Vs vvt may not only more accessible but more fixable down the road. If a bearing happened to go on a HC car, the fixed cam is fixable where on vvt it will not be.