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The biggest difference with a cat delete is a stinker exhaust, especially in the garage at startup, a deeper and richer sound from the muffler, and maybe a couple of HP. More if your cat was partially plugged.
Most come with a O2 sensor bung, so the computer is happy. And the bypass is much cheaper than a new cat.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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