Japspeed crankshaft pulleys are crafted to enhance your engine’s efficiency by reducing rotational mass and boosting horsepower output. Precision-engineered for durability and performance, these pulleys optimise power delivery and throttle response, making them the perfect upgrade for performance-focused vehicles.

• Manufactured from high quality 6061-T6 aluminium, reducing weight without compromising strength
• Designed to reduce the rotating mass, improving throttle response and allowing your engine to rev faster
• Reduces parasitic drag, freeing up more power from your engine
• We recommend fitting new belts when fitting under-drive pulleys
• Direct bolt on replacement in place of the old pulleys