[submariner409]

stbtt......, If your engine (what car, what year, what VIN?) will shift at ~6450 and wind to ~6600, why do your dyno pulls indicate a radical power/torque drop at 6,300 ? It looks like the gains realized really begin around 3,200 rpm and extend up to the mid-5's. Best shift point around 5,450 ??? Nice documentation of exhaust changes for the better. A 4.5% power gain at the top of the power curve is proof that a N* will respond to some exhaust tweaking.