Does anybody that has a set of 3.90 gears think the $2000 spent was worth the money? I've heard it feels like 40-50 HP has been added to the car, in every gear. Is this true? I already have 445 rwhp and 403 rwt. Will the 3.90 gears make that much difference from a standstill strat, or downshifting acceleration. A couple people answered some questions on a prior thread of mine regarding these issues. Thanks. Care to answer these questions too?