Factory 4.1 RCT Exhaust Silencer 08-25 Kawasaki KLX 140 F G L R - FMF 042383

The FMF Racing Factory 4.1 RCT Slip-On Muffler brings advanced performance and durability to mini off-road bikes, featuring FMF’s exclusive Resonance Chamber Technology™ and a mass-centralised design. Built entirely from aerospace grade titanium and finished with a striking blue anodised coating, this exhaust system is engineered for significant power gains across the RPM range, improved weight savings and superior crash resilience. Developed and manufactured in Southern California to precise standards, it complements both FMF and OEM headers, making it an optimal upgrade for demanding riders.

Features

• Incorporates FMF Resonance Chamber Technology™ internally and externally
• Aerospace grade blue anodised titanium muffler with titanium end cap
• Substantial power increases throughout the rev range
• Major reduction in overall weight
• Shorter length for reduced crash damage and improved mass centralisation
• Factory Forward Engineering positions the muffler closer to the engine
• Rapid Tuning System (RTS) for quick adjustments
• Compatible with both FMF and OEM headers
• Includes spark arrestor screen insert (quiet insert available separately)
• For closed course use only

Specifications

• Type: Slip-On
• Configuration: Single
• Construction: Titanium
• Finish: Blue Anodised
• Midpipe Material: Stainless Steel
• End Cap: Stainless Steel
• Spark Arrestor: Included (screen insert)
• Quiet Insert: Available separately
• Item ID: 042383

Vehicle Fitment

Kawasaki

• KLX140 (2008–2020)
• KLX140F (2021)
• KLX140G (2017–2020)
• KLX140L (2008–2021)
• KLX140R (2021–2025)
• KLX140R F (2022–2025)
• KLX140R L (2022–2025)