Factory 4.1 RCT Exhaust SystemThe Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externallyIn addition, achieves a shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering - moving the muffler closer to the motor to centralize massThe Factory 4.1 RCT is constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the Southern California factory