You will probably have to rejet with a muffler change, if you change the air filter, or do an airbox elimination kit, or anything on the carb side of the motor you'll definately have to rejet.
Check out British Customs Predators
I have a set of these and they sound and look fantastic, nice and loud, polished stainless and look great! No baffles to repack either.
Check out British Customs Predators
I have a set of these and they sound and look fantastic, nice and loud, polished stainless and look great! No baffles to repack either.