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.

• Natural aluminum muffler with carbon fiber end cap
• Products - Bike Finder - FMF Racing Massive Power gains throughout the RPM range.
• Huge weight savings
• New RTS (Rapid Tuning System)
• Spark arrestor screen insert included
• Made in the USA
• Can be used with FMF or stock header pipe

(1) Slip-on muffler with black carbon fiber end cap

(1) Stainless steel mid-pipe

(1) Muffler insert

(1) Muffler plug

(1) Ring coil

(2) 8mm-1.25 x 20mm Flange hex head bolts

Instructions