Factory 4.1 RCT Slip-On Exhaust Silencer 24-25 Kawasaki KX 450 F X - FMF 042403

The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap is engineered for riders seeking cutting-edge performance through advanced Resonance Chamber Technology™. Featuring a carbon end cap and a compact design for reduced vulnerability to crash damage, this slip-on silencer centralises mass and delivers exceptional power gains across the RPM range. Constructed exclusively from aerospace-grade materials in Southern California, it provides significant weight savings and is optimised for rapid tuning and easy fitment.

Features

• Advanced FMF Resonance Chamber Technology™ internal and external design
• Shortened, crash-resistant structure with Factory Forward Engineering
• Significant power boosts throughout the entire RPM band
• Lightweight aluminium canister with carbon end cap
• Rapid Tuning System for quick adjustments
• Manufactured from premium alloy-grade titanium and stainless steel
• 94dB quiet insert and spark arrestor screen included
• Designed for closed course use only

Specifications

• Item ID: 042403
• Type: Slip-On
• Configuration: Single
• Construction: Aluminium (muffler), Stainless Steel (midpipe), Carbon (end cap)
• Finish: Gray anodised
• Spark Arrestor: Screen insert included
• Quiet Insert: 94dB insert included
• Carb Warning: No
• Intended use: Closed course

Vehicle Fitment

Kawasaki

• KX450F (2024–2025)
• KX450X (2024–2025)