Hi all! I want to increase my engine's performance and I've thought on replacing the exhaust pipe, but in my country it isn't allowed, so that I've decided to replace my stock headpipe with an afermarket one (like CRD), because it isn't very different-looking, and the police won't notice the change. The question is, has anybody tried it? is there any difference in concerning to performance? Added to this, I'm going to modify the stock muffler (peashooter and drill walls). Bye!