FMF - Factory 4.1


  • Complete systems and slip-on mufflers
  • Systems feature titanium PowerBomb header and midpipe, except where noted
  • Slip-on mufflers available in natural titanium or stainless steel
  • Titanium slip-on mufflers include a stainless steel midpipe
  • The lightest mufflers and full systems available
  • Superior power and performance - horsepower improved throughout the rpm range
  • Feature exclusive proprietary Chamber Core and PowerBomb technology
  • Factory forward engineering centralizes mass, improves handling
  • Made from premium quality American materials
  • Customize with performance tuning inserts and spark arrestor module