ProX Piston Kits are engineered for maximum durability, precise fitment, and optimal engine performance, making them the go-to choice for motocross, off-road motorcycles, dirt bikes, …

ProX Valve Shims are designed to provide precise valve clearance adjustments for motocross, off-road motorcycles, dirt bikes, and ATVs, ensuring optimal engine performance and longevity.

ProX Connecting Rod Kits are engineered for maximum strength, precision fitment, and long-lasting durability, making them the ideal choice for motocross, off-road motorcycles, ATVs, and …

ProX Engine Components are designed for precision, durability, and high-performance reliability, making them the ideal choice for motocross, off-road motorcycles, dirt bikes, and ATVs.

Designed to OEM specifications for perfect fitment and easy installation, ProX jets allow riders to fine-tune their carburetors for altitude changes, aftermarket modifications, and peak …

ProX offers a complete range of clutch components, chains, sprockets, and driveline accessories, all manufactured from high-quality materials to meet or exceed OEM specifications. Each …

Made from high-strength materials and featuring advanced heat treatment and precision machining, ProX bottom-end components ensure optimal load distribution, reduced friction, …

ProX Pistons & Piston Components are engineered for maximum performance, durability, and precise fitment, making them the perfect choice for motocross, off-road motorcycles, dirt bikes, …

ProX Rear Sprockets are engineered for maximum durability, precision fitment, and optimal power transfer, making them the perfect choice for motocross, off-road motorcycles, dirt bikes, and …

Trusted by engine builders, racers, and mechanics worldwide, ProX Crankshafts provide race-proven performance, superior strength, and long-term dependability, keeping your engine …