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  1. 6.0L Performance Parts Discussion
    New to the site but would like a question answered that has bothered me for a while. Simply put, why is one truck louder than another? I have an 06 f250 with a 3.5"dp to 4" straight pipe, economy tune and stock turbo. My buddy has an 06 f250 with 4"dp to 4" straight pipe, extreme tune, and 03...
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