Factory 4.1 RCT Slip-On Muffler with Carbon Cap - Titanium Anodized - TF 250-X - Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externally - 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 mass - Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory - For closed course competition use only.