kind of a unfair question the LS1 intake is worth 15hp alone its also ported and instead of a 75mm TB theres a 90 now so needless to say theres more involved then just the TB here. When i get it on this weekend ill update
06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k