FMF Factory 4.1 RCT Exhaust Silencer 19-23 Kawasaki KX 450 F X - FMF 042369

The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap leverages advanced Resonance Chamber Technology™ to deliver exceptional power gains and reduced weight. Its compact design centralises mass by positioning the muffler closer to the engine, optimising both performance and handling. Precision-built in Southern California using aerospace-grade materials, this slip-on exhaust promises both durability and improved throttle response for competitive riders.

Features

• Incorporates FMF Resonance Chamber Technology™ internally and externally for optimal power output
• Shorter length reduces risk of crash damage and aids mass centralisation
• Aerospace-grade natural aluminium construction with carbon end cap
• Massive power gains throughout the RPM range
• Significant weight reduction over stock exhausts
• Includes the RTS (Rapid Tuning System) for quick adjustments
• Screen-type spark arrestor and 94dB quiet insert included
• Closed course use only

Specifications

• Type: Slip-On
• Configuration: Single
• Muffler Construction: Aluminium
• Finish: Natural
• Midpipe Material: Stainless Steel
• End Cap: Carbon Fibre
• Spark Arrestor: Screen insert (included)
• Quiet Insert: 94dB insert (included)
• Weight: 7.3 lbs (approx. 3.31 kg)
• Carb Warning: Not applicable

Vehicle Fitment

Kawasaki

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

Supplier SKU: 06-9891.F4N. Supplier availability is subject to change.

Why Buy From FDY Performance?

Shop with FDY Performance Ltd, a UK-based motorcycle parts and accessories retailer. We offer friendly product support and UK delivery options. Please check your bike make, model and year against the fitment information before ordering.