Originally Posted by STi_traitor
A friend and I did some pulls to compare Stock vs. BPM. The stock M3 is to the left I am with the camera mounted(BPM).
BPM Stage 2 Tune
MS Test Pipes
OEM Exhaust Modification (Straight Through)
That should put to rest lot of the arguments and shut up the non-believers. Either convert or enjoy from the roadside.