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.

• 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
• Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available