backfire2007

I just swapped myBBK 65mm for a polished 70mm
it looks better andthere is a small difference.

but ifyou got h/c/i you should definately 70mm+

2 kwik

if you can feel the difference your on crack

2 kwik

F/A I find it hard to believe a dealers of hipo parts would steer this guy wrong...no mention of any type cam or much of anything else..hell he may have the stock maf..also people might buy stuff if you post your real name..

BlackBetty93GT

are you selling those gt-40's

jtmustang

probably they have just had a 3 angle valve job new seals blasted and tanked now they have a fresh squirt of ford blue they have also been ported and shaved like.025's so they will add some decent horsepower to a good motor

Rt1Rebel

I'd call it a push. If you are using a long-runner intake, I'd stick with the 65, since you have it. Intake velocity is more important thanvolume for a long runner, non forced application. Additionally, the throttle responce will be more driveable. Just my opinion.

2 kwik

unless those gt-40 heads had bigger valves put in them you might see 20 hp....