Here in the U.S., under Federal EPA laws it's illegal to modify any part of a street legal motor vehicle emissions system that would render the vehicle non compliant to the emissions standards in effect at the time of manufacture. It doesn't matter whether your particular state or locale does emissions testing or not... it's illegal under Federal Law. That said, I'm not worried about the feds coming around to bust me for my FMF Apex slip on... after March 1st, the feds will be lucky if they have the money to issue parking tickets in the nations capital... 
I don't think any aftermarket exhaust can change the fact that a single cylinder thumper will always sound like... a single cylinder thumper. It's funny, I haven't seen any of the guys on the Honda XR forums (or other thumper forums) bitching about how their bikes sound like a CBR250R.
I don't think any aftermarket exhaust can change the fact that a single cylinder thumper will always sound like... a single cylinder thumper. It's funny, I haven't seen any of the guys on the Honda XR forums (or other thumper forums) bitching about how their bikes sound like a CBR250R.
