Believe it or not, ass, yes the car the felt lighter and revved quicker. I believe that the prochamber creates more exhaust flow resistance and makes things more complicated for the engine.
I've had both, H and P/C, with 2 different cams and let me say that I'd rather have the H pipe. It's lighter and flows better. My car felt 'lighter' with the h-pipe.
Reading TMoss' research, the GT40 kept up and even outperformed the Edelbrock and TFS up to 6200rpm.
The Tubular does look better but either of the 3, explorer, cobra or tubular will get it done.
I ask because there was a scam going on where they would call you and claim to be your c/c company. They would say that there's a transaction on your card that appears to be fraud and that they needed to verify that you had the card on you so they would ask for those 3 digits in the back of the...