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ALUMINUM FACTORY 4.1 RCT SL (slip-on) Stainless Steel Rear End Cap ()

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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.

-Can be used with FMF or Stock OEM Header

Notice: Closed Course Use Only
Item ID: 041517
Type: Slip-On
Configuration: Single
Const: Aluminum
Finish: Natural
Midpipe: Stainless Steel
Endcap: Stainless Steel
Spark Arrestor: Screen Insert (included)
Carb Warning: no
Quiet Insert: 94dB Insert (included)
Weight: 5 lbs.

Item Id - Manual Description
043327 - INST SHEET SUZ RMZ250'10 FACT-4.1 (043244-043251)
Make Model Year
HONDA CRF450X 05-09,12-17
    HON CRF450X'05-09/12-17 HEX Q4 S/A MFLR   Item ID: 041516 - Q4 HEX S/A
    For: HONDA CRF450X 2005


    HON CRF450X'05-09/12-17 P-CORE 4 HEX MFLR   Item ID: 041514 - Powercore 4 HEX
    For: HONDA CRF450X 2005


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