I put on a set of duals from Scottsdale muffler. The muffler is tuned for turbo and supercharged engines. I agree that they sound great !!! I have also installed the Airmax intake system. With these 2 mods I have noticed a definite increase in performance. Which intake that you choose is fairly inconsequential (except for cost AirMax unit OUCH!!). If you open up the exhaust side and the intake side of the engine definite improvements in performance are the result!!
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