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Factory4.1 System

The Factory 4.1 system is FMF Racing's premier performance exhaust system. The 4.1 system comes with the choice of the Megabomb or Powerbomb header. Both systems guarantee horsepower gains throughout the RPM range and are the lightest titanium systems available.

Used by professional race teams such as Factory KTM, Yamaha of Troy and Star Racing

Horsepower gains throughout RPM range

Powerbomb header available in stainless steel or titanium; megabomb comes in titanium only

Muffler available in natural or blue anodized finish

94dB Insert Included