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  1. #1
    Active Member
    Join Date
    May 2016
    Location
    Cartersville, GA
    Posts
    57
    Spyder Garage
    0

    Default 998 Engine breathing question

    2012 RTL...… I removed my entire air intake system and installed the JT's air intake. My question is...…. I still have my cat converter installed with a stock muffler... Would I have better performance if I removed the baffels from my stock muffler or leave them in....'
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