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...
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