• FMF Factory 4.1 RCT W/Ss Megabomb HDR Yamaha - 044438
1 1

FMF Racing

FMF Factory 4.1 RCT W/Ss Megabomb HDR Yamaha - 044438

FMF Factory 4.1 RCT W/Ss Megabomb HDR Yamaha - 044438

$944.99 USD
$1,049.99 USD $944.99 USD
Sale Sold out
📦 Special Order — ships in 2–3 weeks
Shipping calculated at checkout.
Special Order — Ships in 3–4 WeeksWe order this part fresh from our distributor when you buy — typical turnaround is 3–4 weeks at most, often sooner. Questions on availability or timing? Email sales@jkloffroad.com.

Fits these machines

Verify fit
Make
Yamaha
Model
YFZ 450
Years
2009–2026
Type
ATV

More parts for the YFZ 450 →

Want to be sure it fits?Parts can vary by year, make, and model. If you already know it fits, go ahead and order with confidence — no call required. If you’d like a hand, reach out and we’ll gladly confirm fitment for you. Email sales@jkloffroad.com, call or text 579-509-2791.

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 Muffler with Carbon End Cap 

-Massive Power gains throughout the RPM range.

-Huge weight savings

-New RTS (Rapid Tuning System)

-FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.

⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov.

View full details