i drive an 02 firebird trans am ws6 package. done several mods to it, mainly induction and exhaust (youre a fucking idiot if you do any mod other than exhaust first) and i also dropped in a 12 bolt moser rear diff and a new ratio of 3.73 instead of 3.23 like stock. custom tuned, and fast as hell. the problem is that i cant keep traction during hard accel..when i shift at around 45-50, i burn out. (dunlop sp5000 asymmetricals) think i run in the 12s, but im quitting racing for several reasons. i have a zex nitrous kit with remote opener and purge kit that i never installed if anyones interested...