It sucks that for the M3 you can pay $2,800 for a muffler with exhaust tips, have to cut your stock exhaust pipes, clamp it to them, and then have an exhaust leak. You can buy an entire exhaust system from the headers back for a C6 corvette for that cost! It won't leak either!
I say this, and I just bought the Akrapovic exhaust system!
2008 M3 Sedan- Alpine White