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Exhaust Muffler / Silencer Bypass Pipes World's lightest, most powerful exhaust system available on the market.Fits:Porsche 911 1975-1989Maximum Power - more than ANY other Muffler / exhaust system. Very aggressive 911 sport-scar sound. Works with stock catalytic converter or our Catbypass Pipe / Euro-premuffler.System comes with outlet pipe, clamp (not shown) and slip-on turndown. Saves up to 30lbs (15KG) off the rear end of a 911. Eliminates all 911 Rear Mufflers.
