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Depending on your scruples I really wouldn't sweat the polybronze on a local level. Step up to national SCCA events and you should have your ducks in a row though. Increased metal content in a bushing would move you to FP by letter of the law.
I'm at 21/33 bars and am still battling push, Fwiw. Big rear camber and the lsd really locked the rear end down.
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Matt - 84 Carrera
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