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The cure for drone-- 1/4 resonance pipes aka J-pipes aka Helmholtz tubes - LS1TECH - Camaro and Firebird Forum Discussion
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NO MORE DRONE from your aftermarket EXHAUST! - Install a DB Killer/Silencer on your Porsche Boxster - YouTube
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No More Exhaust Drone!!! (TSP Dual Exhaust & Helmholtz Resonators) - LS1TECH - Camaro and Firebird Forum Discussion
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