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  1. LamboStang05

    Roush After market roush exhaust vs stock?

    Hey guys, I have a quick question that I think I know the answer to... but I just wanted to be reassured. I converted an 05 GT to a Stage 1. In getting the exhaust, I went with the legal version found here. My question is, is the stock Roush exhaust you normally get on a Roush the same as the...