FMF 025182 Fatty Gold Series Expansion Chamber Exhaust Pipe

The FMF 025182 Fatty Gold Series pipe is a high-performance expansion chamber designed to deliver race-proven power gains across the entire powerband of 2-stroke engines. This pipe broadens and smooths out the power curve while boosting gains throughout the entire power band, providing more low-end, more mid-range, and increased over-rev.

Key Features:

• Over 35 years of racing experience behind the Fatty Gold Series pipe design
• FMF Racing's Tru-Flo stamping process ensures a perfect fit and optimum performance
• Made from carbon steel with nickel plated finish for maximum durability
• Includes O-rings for installation
• Direct bolt-on replacement for stock exhaust pipe

Performance Benefits:

• Noticeable power difference especially in the upper mid-range
• Increased power and torque at lower RPMs compared to stock
• Improved throttle response and snap
• Maintains good over-rev feeling without sharp or abrupt sign-off

The FMF Fatty is the most popular and widely copied expansion chamber design in the world. Whether you're riding trails, tracks, or open terrain, this pipe delivers the performance benefits you're looking for in a 2-stroke exhaust system.