The FMF Factory 4.1 RCT slip-on muffler is a single replacement exhaust silencer for the 2027 Honda CRF250R and CRF250RX. It is not a complete exhaust system. FMF manufactures it at its Southern California factory.

Features

• Resonance Chamber Technology (RCT) is incorporated internally and externally.
• The shorter Factory Forward design positions the muffler closer to the engine to centralise mass and reduce exposure to crash damage.
• Incorporates FMF’s Rapid Tuning System (RTS).
• Includes a screen-insert spark arrestor for a spark-arrested configuration.

Specifications

• Muffler: titanium with a blue-anodised finish.
• Mid-pipe: titanium.
• End cap: blue carbon fibre.

Cross-Reference OEM Part Numbers

• FMF: 041643.

Vehicle Fitments

• Honda CRF250R: 2027.
• Honda CRF250RX: 2027.