FMF Factory 4.1 RCT Slip-On Muffler 042259 - Kawasaki KX250F 2009-2016

FMF Factory 4.1 RCT Slip-On Muffler 042259 - Kawasaki KX250F 2009-2016

Product Description

The FMF Factory 4.1 RCT Slip-On Muffler incorporates advanced Resonance Chamber Technology, utilizing a patented core shape that lowers decibels while preserving maximum power output. Internal ducts within the chambers boost internal volume for enhanced exhaust flow, delivering performance gains across the entire power range.

Designed with FMF's Factory Forward Engineering to centralize mass and resist crash damage, this muffler features a blue anodized titanium canister, carbon fiber end cap, and stainless steel compatibility. It includes a QuietCore 94 dB insert and a spark arrestor, meeting strict AMA and FIM sound regulations.

Top Features: FMF Factory 4.1 RCT

• RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output.
• Internal chamber ducts increase internal volume for improved exhaust flow and power gains throughout the entire range.
• Factory Forward Engineering design centralizes mass and makes the muffler less prone to crash damage[cite: 1].
• Innovative rear end cap allows simple installation of tuning tip inserts or spark arrestors with the removal of just four screws[cite: 1].
• Meets AMA and FIM sound requirements, and includes both a QuietCore 94 dB insert and a spark arrestor[cite: 1].

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this muffler come with a spark arrestor and quiet insert?
A: Yes, it includes a QuietCore 94 dB insert and a spark arrestor pre-installed or packaged with the muffler[cite: 1].

Q: Can this slip-on be used with the stock header?
A: Yes, it is fully compatible with either the stock header or an aftermarket FMF header[cite: 1].

Expert Pro-Tip

Expert Pro-Tip: When servicing your RCT muffler, make sure to use a high-temperature silicone seal lightly around the inlet slip joint during reinstallation to prevent carbon leaks. Regularly check the four rear end-cap screws to ensure they remain secure under high-frequency 4-stroke vibrations.

Recommended Pairings:

• Kawasaki 4-Stroke Performance Parts
• Kawasaki KX250F Performance Parts & Accessories
• Motorcycle Tools & Accessories

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