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FMF Q4 Hex Spark Arrestor For Yamaha 450 WR/YZ (14-18) | 044413

FMF SKU: 79-4179
Regular price


  • Incorporates internal baffles, chambers and space age sound-absorbing materials to accelerate exhaust flow with less noise and minimal power loss
  • Well under the 96db sound output on most machines to satisfy strict sound requirements
  • U.S. Forestry approved Spark arrestor with maintenance free, stainless steel spark arrestor screen
  • Less sound equals more ground
  • Meets USFS and FIM World Enduro sound regulations
  • Power gains throughout the entire rpm range
  • Spark arrestor included
  • Pounds lighter than stock
  • Rugged design for off-road endurance
  • Only US manufacturer to offer dedicated quiet exhaust systems


Make Model Year
YAMAHA WR450F 16-18
YAMAHA YZ450F 14-17
YAMAHA YZ450FX 16-18