Speaking about exhausts ......... The difference between open headers on the dyno and the headers connected to the remaining stock system (resonator, muffler etc.) was 7 hp. This was with the dyno incorrectly calibrated and reading 40hp more than it should have but the delta would remain so I figure 6 hp is to be gained from a 0 restriction exhaust. Lots to be gained from yanking the cats though.

Les