i'm not sure where your driving skill is at, but you might not be shaving any time off. infact, if you unbalance your car left to right you may have a negative effect on your track performance. unless you're racing an oval that is.
Quarter Life Crisis
E90 / / /M3 - JB - 6MT - Speed Cloth - Slick Top - No Nav - KW Coils - UUC Exhaust - AFE S2 Intake