Porting out a 85mm bbk intake to 90mm?
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Porting out a 85mm bbk intake to 90mm?
I have been thinking about porting my 85mm bbk intake out at the throttle body opening to fit a 90mm throttle body. Has anyone done this or thought about it? Can the bbk intake flow good enough for a good gain by going to a 90? I have smothed out the runners of the intake already.