The AVS-2 seems really nice at idle so far. Haven’t gotten the car on the road just yet. Hopefully soon. Just did the brakes and finishing up initial alignment. Still need to R&R rear gear oil and new sure grip additive. What’s in there now is pretty old. I’ll report later on my thoughts. So far it’s very smooth out of the box. Fuel line is stock 5/16 and stock style fuel pump. Shouldnt really go higher than 6psi to the carb