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rattling

  1. General Mustang Tech
    my cats were rattling around 1000-1500 rpm in my 93 5.0 with aftermarket exhaust it sounded like there was rocks in it so i took out my exhaust (all ####in 1 piece) and tilted it upward and banged on it and a few little white bit fell out and some white dust and now im wondering should i just...
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