I know a car here in OZ that had to be slowed down as it was running in the 11.00 bracket and was right on the edge so they decided to change from an Air Gap to a Performer in the hope it would slow the car down. The car only lost a 10th.
Glad you wrote that! The Performer is about a dead equal to the factory iron 4bbl. Both intakes are rated to 5500. They will still make power with more rpm. A tenth is an easy 50 hp at that level.
