FMF Exhaust AN4.1RCT Ssmbmb 045663

FMF Factory 4.1 RCT Exhaust System

4.1 RCT Exhaust with MegaBomb - Anodized Titanium

• The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externally
• Shorter overall length that is less susceptible to crash damage and complementary to FMF's 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 FMF's exacting specifications and is manufactured 100% at their Southern California factory
• Massive Power gains throughout the RPM range.
• Huge weight savings
• New RTS (Rapid Tuning System)
• Includes MegaBomb header
• Includes spark arrestor screen insert
• NOTE: Will not pass 2025 FIM sound regulation

Features stainless steel header with titanium midpipe.

Note: Features stainless steel header with titanium midpipe.

⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.P65Warnings.ca.gov

Specifications

In the box

• 1 x FMF Factory 4.1 RCT Exhaust System (part number 045663)

Sold individually unless the title or specification states otherwise.

Fits 2 models

• KTM XCF-W 500 (2020-2023)
• HUSQVARNA FE 501 (2020-2023)

Years shown are per model. If your bike is not listed, contact us with the year, make and model and we'll confirm before you buy.