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The best of both worlds. This street-legal exhaust system provides the horsepower and torque characteristics of Screamin' Eagle® Pro Race-Use Mufflers while maintaining EPA and CARB approved sound and emission levels. The catalyst-equipped exhaust system utilizes an electronic servo-controlled butterfly valve to alter the gas path between the left and right muffler. The integrated on-board computer measures operating conditions, and limits the exhaust flow to the left muffler to optimize performance, sound and emissions. The results are enhanced torque and horsepower throughout the operating range, and the rich, pleasing exhaust note you expect from a Harley-Davidson®. The complete system includes left and right catalyst-equipped mufflers, servo motor, cable-operated butterfly valve, plug-in on board computer with service diagnostic capabilities, left-hand heat shield, and all necessary installation hardware.
I asked this question on the Exaust thread and got no responce. Although since then I have done stage 1 with stock mufflers on my 05 Road glige and am quite pleased with the results. I see no need at this point to spend the $6-700 for the trick mufflers.
You couldn't get me to put them on my bike with a gun to my head. Sooner or later they will be manditory on bikes in the next couple of years, cant help performance any better than a good set of slip ons. They probably weigh more too .JMHO
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