FMF Factory 4.1 Muffler 044206

When factory racing teams demand peak performance from their exhaust systems, they choose the FMF Factory 4.1. This muffler delivers the power output and throttle response that separates winners from the rest, without sacrificing the durability needed for sustained high-RPM operation. Whether you're racing competitively or pushing your machine to its limits on the trail, the Factory 4.1 gives you the proven performance advantage used by KTM, Can-Am, and Rath Racing teams.

The Factory 4.1 combines precision engineering with practical versatility. It accepts optional quiet inserts for noise-sensitive riding situations and spark arrestors for trail compliance, while maintaining full performance characteristics. The bolt-on design integrates seamlessly with FMF Powerbomb, Megabomb, or your stock header—giving you the flexibility to dial in exactly the setup your machine needs.

• MPN: 044206
• Manufacturer: FMF
• Type: Performance muffler
• Installation: Bolt-on
• Compatible headers: FMF Powerbomb, FMF Megabomb, stock
• Optional accessories: Quiet inserts, spark arrestors
• Use case: Racing, high-performance riding
• Proven by: Factory racing teams