Factory 4.1 RCT Exhaust Silencer 19-23 Kawasaki KX 450 F X - FMF 042371

Designed for high-performance off-road and motocross competition, the FMF Racing Factory 4.1 RCT Titanium Anodized Slip-On with Carbon Cap leverages advanced FMF Resonance Chamber Technology™ for superior power and weight savings. The slip-on muffler features a blue anodised titanium body and carbon end cap, engineered to centralise mass and deliver impressive horsepower gains across the RPM range. Aerospace-grade titanium and 100% American manufacturing ensure unmatched durability and precise fitment for demanding riders.

Features

• Closed course use only
• Lightweight titanium construction with blue anodised finish
• Carbon fibre end cap for enhanced strength and aesthetics
• Significant power gain throughout the RPM range
• Rapid Tuning System (RTS) for quick adjustments
• Shorter overall length for reduced crash susceptibility
• Muffler placement optimised for mass centralisation
• Includes 94dB quiet insert and spark arrestor screen insert
• Precision fitment, manufactured entirely at FMF’s USA facility

Specifications

• Item ID: 042371
• Type: Slip-on
• Configuration: Single
• Construction: Titanium
• Finish: Blue anodised
• Midpipe: Titanium
• Endcap: Carbon fibre
• Spark Arrestor: Screen insert (included)
• Quiet Insert: 94dB insert (included)
• Weight: 7.0 lbs
• NOT CARB compliant; for closed course only

Vehicle Fitment

Kawasaki

• KX450F (2019–2023)
• KX450X (2019–2023)