Quote:

Ryan,
I meant the green one that is posted. Wondering if putting the taper in the plenum will make a difference?



Sorry for the confusion, have not seen that design for sale, but yes they almost always make "some" difference. I have never put a tapered Spacer, whether it be an HVH or a Wilson on motor on dyno & not have it do SOMETHING positive.. gains like 15HP are rare. Normally you see 4-6 TQ/HP. Maybe 8-10 sometimes....