Originally Posted by N111CUK
Hi, I have an auto and also have found an M3 DCT complete subframe.
My question is, does this final drive (3,15) work better for you. I also have a heavily modded car pushing over 400WHP so this will help determine the final drive
I have the M3 rear on my FBO 135i and I am also 6AT. Going taller than stock sounds silly to me. I have the 3.85 of the manual M3 and it is perfect.