FMF’s Q4 HEX S/A 042410 takes off-road riding to the next level by delivering significant power gains while remaining remarkably quiet. Harnessing advanced chamber and baffle engineering with proprietary multistage packing, the Q4 HEX provides exceptional performance that doesn’t exceed stringent sound regulations. Its rugged yet lightweight aluminium and stainless steel construction ensures durability for the toughest environments, all while reducing weight compared to stock systems.

Features

• Delivers notable power gains across the full RPM range
• Industry-leading quiet technology meets USFS and FIM World Enduro sound standards
• Constructed with grey anodised aluminium canister and robust stainless steel midpipe/endcap
• Weighs less than the OEM exhaust for enhanced agility
• Integrated screen-type spark arrestor for safety and compliance
• Rugged build ensures off-road endurance
• Complete with a quiet insert
• Made in the USA

Specifications

• Notice: Closed Course Use Only
• Item ID: 042410
• Type: Slip-On
• Configuration: Single
• Construction: Aluminium
• Finish: Grey Anodised
• Midpipe: Stainless Steel
• Endcap: Stainless Steel
• Spark Arrestor: Screen Insert (included)
• Quiet Insert: Included
• Carb Warning: No

Vehicle Fitment

Kawasaki

• KX250F (2025)
• KX250X (2025)