Here in Michigan for several events we must pass a 94DB sound level check. The main test criteria involves the RPM's needed to reach PEAK horsepower. That information is used to set up a harmonics tuner, and then the throttle is brought to a level that the tuning wand movement is at a minimum. The sound reading is taken at that point. Does anyone know where I can find the RPM value at PEAK horsepower, for a factory stock 01 wr426f, and a 01wr426 with the throttle stop shortened, air box lid removed, and stinger removed.