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Scott Helme on X: "The new Power Valve system has a DDE (Dynamic Drone Eliminator) built in to control the bass/hum/drone inside the car. Loud exahust but without the annoying drone in
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Amazon.com: Exhaust Baffle Silencer Exhaust DB Killer Silencer Muffler Noise Eliminator Fit for 2 inch Motorcycle Exhaust Pipe : Automotive
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