FMF Factory 4.1 RCT Anodized Competition Exhaust with MegaBomb for Yamaha YFZ450R, Part 044438

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.

The FMF Factory 4.1 RCT Anodized Competition Exhaust with MegaBomb is designed for riders seeking stronger performance and reduced weight on compatible Yamaha YFZ450R models. Manufacturer part number 044438 and vendor part number 044438 identify this FMF exhaust system, which fits 2009 through 2018 Yamaha YFZ450R sport ATVs.

Built with FMF Resonance Chamber Technology™, the Factory 4.1 RCT is engineered to deliver substantial power gains throughout the RPM range. Its shortened overall design helps reduce exposure to crash damage while supporting FMF Factory Forward Engineering, positioning the muffler closer to the engine to help centralize mass. The included MegaBomb header complements the exhaust system’s performance-focused design.

The FMF Factory 4.1 RCT uses aerospace-grade materials and a proprietary blend of alloy-grade titanium developed to FMF specifications. The system also features FMF’s RTS (Rapid Tuning System), allowing convenient tuning adjustments for changing riding conditions and performance preferences. It is manufactured at FMF’s Southern California facility and is intended for competition and off-road use.

This exhaust is not legal for use in California on pollution-controlled vehicles. In California, it is intended for race use only; a waiver may be available. Verify vehicle compatibility and applicable emissions requirements before installation.

Features:

• Fitment: Designed for 2009-2018 Yamaha YFZ450R models
• Performance: Delivers substantial power gains throughout the RPM range
• Construction: Made with aerospace-grade materials and FMF’s proprietary alloy-grade titanium blend
• Technology: Incorporates FMF Resonance Chamber Technology™ for performance-focused exhaust tuning
• Tuning: Includes FMF RTS (Rapid Tuning System) for convenient adjustment
• Design: Shortened muffler layout helps reduce crash exposure and supports centralized mass
• Application: Competition and off-road use; not legal in California on pollution-controlled vehicles

Fitment:
2009 Yamaha YFZ450R
2010 Yamaha YFZ450R
2011 Yamaha YFZ450R
2012 Yamaha YFZ450R
2013 Yamaha YFZ450R
2014 Yamaha YFZ450R
2015 Yamaha YFZ450R
2016 Yamaha YFZ450R
2017 Yamaha YFZ450R
2018 Yamaha YFZ450R
2019 Yamaha YFZ450R
2020 Yamaha YFZ450R
2021 Yamaha YFZ450R
2022 Yamaha YFZ450R