Those fenderwell headers probably cost you some power on the dyno.
The extra long primary length tends to make the peak happen earlier than with more “normal length” headers.
My headers are underchassis 2" TTI. These are 2 1/8 fender exits. 2 different styles, 2 different sizes.
Now if some power was left on the table, and his has often been called an unflattering dyno to begin with, I'm good with that. I mostly wanted a proper tune and a controlled break in. I also tried 2 different carbs.
You think those TTI's out perform the dyno headers? That actually surprises me.
Good thing is, he re-tunes your engine once it is in the car/boat etc. So it will still be dialed in perfect.
