Originally Posted by Wes.
Probably nothing measurable. Though it should sound a lot better. Supras and R32-R34 GTRs sound amazing because of the big single exhaust on the I6.
'08 E90 335i 6MT. VM 6466g2 kit. Stage3+ Fuel-It with FPR return, BMS PI injection, widebody
'09 Z4 sDrive35i DCT, MHD Backend flash, JB4, DCI