ported 853's milled 30k
#3
11 Second Club
iTrader: (1)
Im goin to assume you also have an aftermarket cam? there on a smaller basecircle, and affect the length needed too. I milled .033", and ended up with 7.350" from TSP. which actually ended up being only .025" shorter then stock if I remember correctly. not as quiet as stock, but not as loud as alot of others combo's Ive heard (talkinga bout the valvetrain noise). with an aggressive cam, your not goin to get it as quick as stock no matter what.