The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, FMF achieve a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering - moving the muffler closer to the motor to centralise mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF exacting specifications and is manufactured 100% at their Southern California factory.

FEATURES

• Available in Blue Anodised Titanium Muffler with Carbon End Cap 
• Massive Power gains throughout the RPM range.
• Huge weight savings
• New RTS (Rapid Tuning System)
• Advanced engineering and patented design
• Meets AMA/FIM 94dB sound requirement
• Spark arrestor available for purchase
  
• Use with FMF or stock/OEM header
• Easily serviced for repacking
• FMF uses the highest quality proprietary blend of alloy grade titanium made especially to FMF standards.

Please note: Image for reference. Correct product will be provided.

SPECIFICATIONS

Notice: Closed Course Use Only
Item ID: 044445
Type: Slip-On
Configuration: Single
Const: Titanium
Finish: Blue Anodised
Midpipe: Titanium
Endcap: Carbon
Spark Arrestor: Screen Insert (included)
Carb Warning: no
Quiet Insert: 94dB Insert (included)
Weight: 8.3 lbs.

BIKE FITMENT

YAMAHA

• WR450F 2019-2026
• YZ450F 2018-2026
• YZ450FX 2019-2026