Powered by an electronically fuel-injected 686cc liquid-cooled, four-stroke engine that's based off Yamaha's wildly popular Raptor 700, the Yamaha Grizzly 700's powerplant gives "right now" throttle response and enough power to put a smile on any rider's face. To take it to the next level, we designed the Utility Series Slip-On exhaust to pick up 8% more horse power across the power curve. For riders who need stock level sound, the Swamp Series was developed to get the same horse power gain with near stock level sound. Whatever series you choose, your guaranteed horse power gains that you can see and feel.