Originally Posted by nkadisha
Pretty soon I'll put a JB4 on my car and race my friend with an N54
We'll both be sedans, both be auto, both have JB4s and AR Downpipes
Ill make sure to take a video!
I had to be a pain again but downpipes alone may throw your results off. I believe his gains are a little larger with downpipes than yours, this truly should be something that is left to tune only.