Suspension is stock other than a Helwig adjustable rear seat bar. I was trying to leave at 0-1 psi that trip the track prod was non existant for the even all street tires really tore the starting line up. Car hooks bettter at a stop light. Yeah seat time would help .
on the street Try you a boost controller to ramp up in stead of instant.power. at the track shut it off adjust your wastegate and let her rip tater chip!! I have a 2 stage boost controller (almost got the street dialed in so it wont' spin if i stomp it.. havent been to the track yet. with the 275s... I need new ones.