If you put the ratios into a gearing calculator, diffsonline.com has one, you'll only be able to get to ~125 with the stock 5spd and 3.73. With a 6spd you can get to 150 but those aren't cheap. __________________ ~Dave~ 98 328ti Morea Grun slicktop 11 128i space gray slicktop 13 JGC WK2 Deep Cherry Search | RealOEM |