Totally different story with the 340 we tested them on. We had 476HP with the 1 5/8 Summit headers. Went to 1 5/8- 1 3/4 TTI and picked up 40HP and 300rpm. Guess its all in the combo. But we peaked at 7200rpm
Yeah, understood, but this engine basically peaked at 6,000 rpm. If I was building something to buzz over 7,000 rpm I would choose the TTI headers also. Like I said the horsepower difference was starting to get larger at 6,300 rpm.
