LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENCED FOR USE, UPON A HIGHWAY. OUTSIDE OF CALIFORNIA, CHECK LOCAL AND STATE EMISSIONS REGULATIONS FOR COMPLIANCE.
A: These would simply install into the end of the pipes to bring the sound level down. In order to use this baffle you would have to have the Vance & Hines 4" Twin Slash Rounds Exhaust system installed on your motorcycle. They will not work on the OEM or any other aftermarket Exhaust.