Empire Industries Slip On Exhaust for all Yamaha R-MAX is made of tig welded 304 stainless steel 1 into 2 construction with 6061 Aluminum silencers with billet end caps. 2 inch perforated core for added power over stock. No catalytic converter to trap heat like the stock exhaust system. Easy to mount with our 4 bolt mounting system. Nice deep sound! Quiet core/ spark arrestor inserts are available Must run a fuel tuner with this Exhaust.