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decatting or straight

  1. Benefits of decatting/straight piping a JTD?

    Alfa 147, 156 & GT
    My rear silencer is a bit rusty, so figure I should replace the whole exhaust. Wanted to get a ragazzon dual exit but theyre 400? + 400? shipping. Will probably get a custom one made. Are there any benefits of doing this? Will the turbo behave better or worse? Or should I get a whole exhaust...