The FMF Q4 Hex S/A YZ450F exhaust silencer is a trail-legal slip-on built for riders who need to pass strict sound and spark requirements without giving up real power, making it the direct answer for the FMF Q4 Hex slip-on exhaust YZ450F search. FMF engineers the Q4 Hex S/A to run well under 96dB on most machines, which satisfies the tightest sound restrictions you'll encounter on public trails and organized rides. Throttle response stays crisp because internal baffles and chambers accelerate exhaust flow instead of strangling it. FMF has the forestry approvals and the track record to back every claim on this silencer.
- Keeps sound output well under 96dB so you won't get turned away at the gate.
- Built with internal baffles and chambers that accelerate exhaust flow with minimal power loss.
- Fits the Yamaha YZ450F as a direct slip-on replacement for the stock silencer.
- Delivers U.S. Forestry approved spark arrestor protection through a maintenance-free stainless steel screen.
- Channels exhaust through space-age sound-absorbing materials so the spark arrestor exhaust silencer stays quiet without added weight.
Pick up the FMF Q4 Hex S/A YZ450F exhaust silencer at DDRV, authorized dealer.