Q4 Hex Exhaust Silencer 25-26 Honda CRF 250 R RX - FMF 041617

The FMF Q4 HEX S/A is a slip-on exhaust silencer for 2025–2026 Honda CRF250R and CRF250RX motorcycles. It replaces the original muffler to reduce exhaust noise during off-road riding while providing power gains across the rev range. Its internal chambers, baffles and multistage packing are designed for sustained sound control.

Features

• Lighter than the original exhaust, with rugged construction for demanding off-road use.


• Can be fitted with the stock header or a compatible FMF header; the header is not included.


• Meets the stated USFS and FIM World Enduro sound requirements.


• Designed and manufactured in the USA.


• Closed-course use only.


• Repack the serviceable muffler as needed to maintain sound control and performance. Check the spark-arrestor screen periodically and clean it if obstructed.

Specifications

• Configuration: single slip-on silencer.


• Body: grey anodised aluminium.


• Midpipe: stainless steel.


• End cap: conical stainless steel.


• CARB warning: No.

Kit Contents

• Screen-type spark-arrestor insert.


• Quiet insert designated 94 dB.

Cross-Reference OEM Part Numbers

• FMF part number: 041617.

Vehicle Fitments

• Honda CRF250R: 2025–2026.


• Honda CRF250RX: 2025–2026.