ooo i see. because im about to buy an axle back, but didnt wanna drop 2k on a xpipe... so i with the test pipes and i tune i should be fine. hopefully i make around 370whp with these mods and my intake.
2009 M3 DCT
Matte Grills, Matte Gills, Paint matched reflectors, RPI scoops and filter, H&R springs, 18MM spacers in front, 15MM spacers in rear.