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  1. *Muffler suggestion help* For my IS300 2003

    Go Fast Stuff
    I bought my is with the muffler and 3rd cat already deleted with the stock headers still in place, I wanted more pops from the exhaust so i recently deleted my res and replaced from where the resonator was back with 2 1/2” pipe and a old used 3” tip. Now this is what im talking about it! I love...