3D5X-FMF-040050 PowerBomb Header (Moto) - Stainless Steel

PowerBomb Header (Moto) - Stainless Steel


by FMF Racing

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Boosts horsepower by as much as 10%

Patented technology (Patent #7510050)

A perfect fit with any FMF muffler

Quality construction for maximum durability

Reduces sound output by as much as 1.5 dB

Choose from stainless steel or titanium

Boosts horsepower by as much as 10%.Patented technology (Patent #7510050).A perfect fit with any FMF muffler.Quality construction for maximum durability.Reduces sound output by as much as 1.5 dB.Choose from stainless steel or titanium

Utilize FMFs patented module precisely located at the initial stage of the header for specific applications.Position Bomb increases performance.Horsepower is increased as much as 10%.Act as pre-muffler helping to lower the decibel output.The expansion and contraction of exhaust sonics through the system causes increased flow.Available in stainless steel for strength combined with light weight, or in titanium for even greater weight savings.Select applications available in SX version that is designed for more low to mid-range power and an MX version that is focused in the mid-to-upper rpm range



  • Brand: FMF Racing
  • Manufacturer Item Number: 040050
  • Distributor Part Number: FMFY421H, 791661
  • Weight: 1.50
  • Height: 2.50
  • Length: 14.00
  • Volume: 0.17
  • Width: 8.50
  • Material: Stainless Steel, Stainless Steel
  • Color: Stainless Steel, Natural
  • Attr Color: Natural


This PowerBomb Header (Moto) - Stainless Steel fits the following models:

Yamaha, Offroad, WR400F, 1998

Yamaha, Offroad, WR400F, 1999

Yamaha, Offroad, WR400F, 2000

Yamaha, Offroad, WR426F, 2001

Yamaha, Offroad, WR426F, 2002

Yamaha, Offroad, YZ400F, 1998

Yamaha, Offroad, YZ400F, 1999

Yamaha, Offroad, YZ426F, 2000

Yamaha, Offroad, YZ426F, 2001

Yamaha, Offroad, YZ426F, 2002