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  1. LS & LT Installation Questions and Answers
    I'm going to try to consolidate this into one thread if possible. I'm doing a 57 w/04 GTO LS1, (4L60E, if it matters). The engine has a 4" intake. I went out and bought Spectre 4" components and hobbled together a respectable Cold Air Intake. I went and bought my stock 04 GTO MAFS only to find...
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