FMF 024056 Fatty Pipe Exhaust System for Yamaha - YZ250

The FMF Racing Factory Fatty Pipe is a high-performance two-stroke expansion chamber designed for Yamaha YZ250 motorcycles (1999-2012). This race-proven exhaust pipe delivers exceptional power gains throughout the RPM range while maintaining durability for demanding off-road and motocross conditions.

Key Features:

• Features the same precisely-engineered cone sections as FMF's popular Fatty pipe design for optimized exhaust flow and power delivery
• Dual-gauge steel construction using premium US-made materials for the ideal balance of strength and weight
• 19-gauge steel header section provides maximum durability and resistance to impact damage
• 20-gauge steel body and rear cone reduces overall weight without sacrificing performance
• Thinner body material enhances power output through more efficient heat resonance and thermal dynamics
• Hand-pounded seams after stamping ensure superior fit and structural integrity
• Raw, unplated finish with protective oil coating prevents corrosion while reducing weight

The Factory Fatty pipe represents FMF's commitment to race-winning performance, combining advanced metallurgy with proven two-stroke tuning expertise. The strategic use of different steel gauges creates an exhaust system that's both lightweight and durable enough for professional racing applications.