Factory 4.1 RCT Titanium Anodized Exhaust Silencer 25-26 Honda CRF 250 R RX - FMF 041619

The FMF Factory 4.1 RCT is a single slip-on exhaust silencer for 2025–2026 Honda CRF250R and CRF250RX motorcycles. It replaces the original silencer to alter exhaust performance and reduce weight while retaining the original Honda header or using a compatible FMF header. Manufactured in Southern California, it is intended for closed-course competition use only.

Features

• FMF Resonance Chamber Technology™ is incorporated internally and externally to support power delivery across the rev range.


• A shorter overall profile helps reduce susceptibility to crash damage.


• Factory Forward Engineering centralises mass to support handling.


• The Rapid Tuning System (RTS) and snap-ring rear end cap allow exhaust inserts to be changed quickly.


• The silencer can be repacked as part of routine maintenance to help maintain sound control and performance.

Specifications

• Configuration: single slip-on silencer.


• Silencer and midpipe: proprietary aerospace-grade titanium.


• Finish: blue anodised.


• End cap: carbon fibre.

Kit Contents

• Screen-insert spark arrestor.


• Quiet insert, described by FMF as meeting AMA professional sound requirements.

Installation and Use

• A replacement header is not required; check that any FMF header selected is compatible.


• FMF generally recommends a light bead of high-temperature silicone at the midpipe-to-header joint. Follow model-specific instructions where they differ.


• CARB warning: No, as stated in the supplied product details.

Cross-Reference OEM Part Numbers

• FMF: 041619.

Vehicle Fitments

• Honda CRF250R: 2025–2026.


• Honda CRF250RX: 2025–2026.