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  1. E39 (1997 - 2003)
    I have a 03 M5 (Intake, Software, exhaust all Done) I also have a 01 530I (Daily driver)... I did the intake & software. I want to do the exhaust next. However paying 800 to 1000 plus dollars for a 3 to 5 percent horsepower gain make no sense. I would like something custom or an exhaust for...
  2. E39 (1997 - 2003)
    I have a 540 and i am wondering if anyone has any input on a resonator delete or possibly removing one of the mufflers. Anyone do any modifications to the stock exhaust system for a slightly more aggressive exhaust note?? Thanks for the info
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