FMF Quiet Core Spark Arrestor Insert Q4 Hex | Part #040671

The FMF Quiet Core Spark Arrestor Insert (Part #040671) is a precision-engineered replacement insert for the FMF Q4 Hex exhaust system on 4-stroke engines. Designed to reduce exhaust noise while maintaining peak performance, this insert helps your bike meet legal sound regulations on trails, parks, and closed-course events — without sacrificing power.

Built from durable materials, the insert resists heat and wear over extended use, maintaining its spark-arresting and noise-dampening efficiency ride after ride. Installation and removal are tool-friendly and straightforward, making it ideal for routine maintenance or pre-ride prep.

Product Details:

• Brand: FMF
• Part Number (MPN): 040671
• SKU: 040671
• Weight: 0.5 lbs
• Compatibility: FMF Q4 Hex exhaust systems, 4-stroke engines

Features:

• Reduces exhaust noise to meet legal sound regulations
• Spark-arresting design for trail and forest use compliance
• Durable construction for long-lasting filtering efficiency
• Easy installation and removal for quick maintenance
• Compatible with a wide range of off-road 4-stroke applications

In the Box: 1x FMF Quiet Core Spark Arrestor Insert