To me that just sounds wrong. If it doesnt actually help its useless.Did you know the Ford designers programmed in a miss in the 99 Cobras to get then proper exhaust note?? Yea..lame in my opinion..I have a friend that fixed that. He built his engine and had it neutral balanced..now you never know its idling. Now that its properly tuned.
that is pretty much exactly how my motor sounds like with the cummins pump on it(although not as loud)-Owen