Factory 4.1 RCT Exhaust Silencer 25-25 Kawasaki KX 250 F X - FMF 042411

Designed for riders demanding top-tier performance and engineering, the FACTORY 4.1 RCT Stainless Slip-On with Carbon End Cap leverages FMF's advanced Resonance Chamber Technology™, offering internal and external enhancements for optimal power delivery. Its compact construction reduces crash susceptibility while centralising mass with a forward-mounted design. Manufactured entirely in Southern California from aerospace-grade materials, this slip-on provides substantial power gains across the RPM range and impressive weight savings, making it an ideal choice for competitive racers.

Features

• Suitable exclusively for closed course use


• Incorporates FMF’s signature Resonance Chamber Technology™


• Compact, crash-resistant design with forward muffler positioning to centralise mass


• Aerospace-grade alloy and stainless steel construction


• Carbon end cap for lightweight strength and durability


• Aluminium muffler with a grey anodised finish


• Rapid Tuning System (RTS) for quick adjustments


• Massive power gains throughout the RPM range


• Includes 94dB quiet insert and screen-type spark arrestor

Specifications

• Item ID: 042411


• Type: Slip-On


• Configuration: Single


• Construction: Aluminium


• Finish: Grey Anodised


• Midpipe: Stainless Steel


• Endcap: Carbon


• Spark Arrestor: Screen insert (included)


• Quiet Insert: 94dB insert (included)


• Carb Warning: Not applicable

Vehicle Fitment

Kawasaki

• KX250F (2025)


• KX250X (2025)