Horrible how? My Tbird just smelled like gas (idled rich when cold). More specifically that leaded goid stuff. It was a 4.6L 2V with kooks 3/4 length headers and 2.5 inch dual exhaust. Miss that car sometimes.I don't recommend it. But you'd have to disable the rear O2 sensors otherwise you will get an error code. It will also make your exhaust smell horrible.
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