Pump Rotor & Vane Kit

The Holley Pump Rotor & Vane Kit (MPN 12-811) is an essential fuel pump rebuild component designed for technicians and performance enthusiasts maintaining or restoring Holley Blue and Red series electric fuel pumps. This rotor and vane assembly serves as the core internal element that pressurizes fuel throughout your fuel delivery system, making it critical for vehicles relying on reliable, consistent fuel flow. Whether you're rebuilding a pump to restore factory performance or servicing a high-demand racing application, this kit addresses wear and component degradation that naturally occurs over time in fuel pump internals.

The rotor and vane design operates through positive displacement mechanics—the rotor spins eccentrically within the pump housing while spring-loaded vanes ride along the rotor's surface, creating expanding and contracting chambers that draw fuel from the tank and force it into the fuel rail. Holley's engineering ensures precise clearances and durable materials that withstand sustained pressure cycles, preventing fuel starvation under load and maintaining stable fuel delivery across idle, cruise, and wide-open throttle conditions. This rebuild kit allows you to restore pump efficiency without replacing the entire fuel pump assembly, offering cost-effective maintenance for both street and competition fuel systems that demand reliability.

Mechanics and builders working on carbureted or fuel-injected engines equipped with Holley Blue or Red electric fuel pumps will find this rotor and vane kit indispensable for preventive maintenance and repair. The compact design (5 x 2.05 x 7 inches) and lightweight construction (0.12 lbs) make it convenient to stock and install during pump service intervals. Proper installation requires basic mechanical knowledge and attention to pump reassembly procedures; refer to your pump's service manual to ensure correct orientation and vane clearance for optimal performance and longevity.