Hang on....he went from a 525d..... to a 335i. (top choice btw)

so hes gone from a real proper oil burner to a cutting edge twin turbo machine (arguably the first turbo car bm have made for the road) and he wants to tune it.....

errr, try driving all 306hp of it and then think about tuning it. I Wouldnt mess around with it until A, the warranty runs out or B, 306hp with no turbo lag gets boring....

Silver