FMF Factory 4.1 — RCT Stainless Full System — Husqvarna FE501, KTM 500 XCF-W

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.

• Available in Natural Aluminum with Carbon Fiber End Cap
• Massive Power gains throughout the RPM range.
• Huge weight savings
• New RTS (Rapid Tuning System)
• FMF uses the highest quality proprietary blend stainless steel made especially to our standards.

Full system. Header and muffler included.

This is a 4-stroke exhaust. It is engineered for the 4-stroke engine architecture above and physically will not fit a 2-stroke bike. Verify your engine type before purchase.