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  1. Single Stack or Leave It Alone...

    07.5-10 LMM Performance Parts Discussion
    I'm sure that this has been asked before, but I couldn't find the response I was looking for. I currently have a 4" MBRP straight pipe exhaust on my truck with a 6" tip. I was never really crazy about trucks with stacks, especially single stacks. But after going tomultiple truck pulls and...
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