The FMF Factory 4.1 RCT is a single slip-on muffler for the specified Honda CRF250R and CRF250RX models. It replaces the muffler portion of the exhaust rather than supplying a complete header-and-muffler system.

Features

• Resonance Chamber Technology (RCT) is intended to refine exhaust performance.
• The shorter Factory Forward design positions the muffler closer to the engine to reduce its exposure to crash damage.
• Features FMF’s Rapid Tuning System.
• Includes a screen-type spark-arrestor insert.

Specifications

• Canister: grey-anodised aluminium.
• Mid-pipe: stainless steel.
• End cap: carbon.

Cross-Reference OEM Part Numbers

• FMF: 041642.

Vehicle Fitments

• Honda CRF250R — 2027.
• Honda CRF250RX — 2027.