FMF 4.1 STAINLESS SLIP ON SILENCER, YAMAHA 18-25 YZ450F/19-25 YZ450FX/ 25 WR450F

Mfg Part#-044443

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, it achieves a shorter overall length that is less susceptible to crash damage and complementary to the 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 FMF's exacting specifications and is manufactured 100% at their Southern California factory.

Features:

• 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 their standards
• Can be used with FMF or Stock OEM Header

Specifications:

• Notice: Closed Course Use Only
• Type: Slip-On
• Configuration: Single
• Muffler Construction: Aluminum
• Finish: Natural
• Midpipe: Stainless Steel
• End cap: Carbon
• Spark Arrestor: Screen Insert (included)
• Quiet Insert: 94dB Insert (included)