FMF Titanium 4.1 RCT Silencer 2018-2022 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 FMF's Southern California factory. Blue Anodized Titanium Muffler with Carbon End Cap New RTS (Rapid Tuning System) When paired with titanium header, savings 2.5 pounds on 16' FC 250/350 and 2.6 pounds on FC 450 FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards Recommended to use in conjunction with FMF Titanium Megabomb headpipe 79105979003 Also Fits: KTMSXF/XCF (19-22) 250SXF/XCF (19-22) 350/450GasGas MC 250F (21-23)MCF/EXF 350/450 (21-23)