Bearing - Std SMI Motor

The Bearing - Std SMI Motor (MP-4400-06) is a precision fuel pump bearing engineered for high-performance fuel delivery systems, specifically designed for MagnaFuel ProTuner series pumps. This bearing is essential for mechanics and enthusiasts building or maintaining fuel systems that demand reliability under extreme boost and extended rpm conditions. Whether you're tuning a street car, bracket racer, or forced-induction platform, a quality fuel pump bearing ensures consistent pressure delivery and extends the service life of your pump motor assembly.

Fuel pump bearings support the rotating armature shaft and minimize friction during high-speed operation, reducing wear on the motor windings and improving overall pump efficiency. The Std SMI motor bearing is manufactured to tight tolerances, ensuring smooth rotation and minimal radial play—critical factors when running fuel pressures above 60 psi or engine speeds exceeding 7,000 rpm. At just 0.03 lbs and compact dimensions (3.05 x 0.3 x 3.7 in), this bearing integrates seamlessly into OEM and aftermarket pump housings without adding bulk or weight to your fuel system assembly.

Technicians rebuilding MagnaFuel ProTuner pumps, tuners upgrading fuel system internals, or mechanics replacing worn motor components will find this bearing indispensable for restoration and performance work. It is compatible with all Std SMI motor configurations and recommended as a preventive maintenance item when disassembling the pump for inspection or upgrades. Installation is straightforward during pump assembly—proper seating ensures optimal pump longevity and prevents cavitation or pressure fluctuations that compromise engine tuning.