**Some FMF fitments are out of stock because of availability from the manufacturer and therefore are a pre-order. Lead times range from 4 weeks to 12 weeks**
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.
Materials: end cap - carbon, muffler outer skin - titanium, muffler front cap - stainless, header - stainless. Includes spark arrestor screen.
Features:
- Blue Anodized Titanium Muffler with Carbon End Cap
- Massive Power gains throughout the RPM range.
- Huge weight savings over stock
- New RTS (Rapid Tuning System)
- FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.
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Sound levels at idle speed tested at 1' above and 1' behind each
muffler on the same 21' 500 EXCF tested back to back.
Stock muffler 82
Stock w Pro Moto end cap / ultra silent insert 85
Stock w Pro Moto end cap / silent insert 86
Stock w Pro Moto end cap 88
Graves Motorsports w db killer 85
Graves Motorsports 89
Fmf q4 84
Fmf 4.1 88
Fmf power core 88
Lexx w db killer 86
Lexx w spark arrestor insert 87
Lexx 89
Akropovic 85
FOR ANY FITMENT QUESTIONS CONTACT US
FITMENT:
045663
Make / Model / Year
20-23 HUSQVARNA 501 FE, FEs
20-23 KTM 500 EXC-F, XCF-W
045653
Make / Model / Year
GAS GAS / EC350F / 21
HUSQVARNA / FE350 / 20-21
HUSQVARNA / FE350 ROCKSTAR EDITION / 21
20-23 HUSQVARNA 350 FE, FEs
20-23 KTM 350 EXC-F, XCF-W