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.

-See Features Tab -> Fitment for header compatibility

Features
Notice:Closed Course Use Only
Item ID:042291
Type:Slip-On
Configuration:Single
Const:Aluminum
Finish:Natural
Midpipe:Stainless Steel
Endcap:Carbon
Spark Arrestor:Screen Insert (included)
Carb Warning:no
Quiet Insert:Meets AMA Professional Sound Requirements
Weight:5 lbs.

Applications
Make Model Year
KAWASAKI KX450F 09-11