FMF 4-Stroke Premier 4.1 Muffler Repack Kit

This high-performance kit is engineered specifically for FMF’s 4-stroke 4.1 systems to bring them back to factory-fresh specs. Unlike standard fiberglass matting, the Premier kit features a proprietary blend of high-temp resistant fibers designed to handle the extreme heat and pressure of modern high-performance 4-strokes. Regular repacking not only keeps your bike compliant with sound regulations but also ensures optimal backpressure for maximum horsepower and torque.

• Designed specifically for FMF Factory 4.1 and PowerCore 4.1 exhaust systems
• High-temp resistant packing material provides superior longevity over standard fiberglass
• Helps maintain peak engine performance and optimal power delivery
• Significantly reduces exhaust noise levels to meet track and trail requirements
• Prevents excessive heat transfer to protect the muffler canister from discoloration or failure
• Includes high-quality rivets and hardware for a complete, professional service
• Proudly made in the USA

Specifications

Part Numbers Specification