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  1. 357gt

    H or X pipe question

    ok ive ha d a 351 in my car for bout a year now 85 GT i have mac LT swap hedders w/ ball style collector when i put the engine in i took it to a muff shop and had just plain dual exh w/ 2 chambers and turn downs put on it well i wanna put a X or H pipe on it now and tail pipes my...