ProStar 500 Seal Kit

The ProStar 500 Seal Kit (MP-4450-SK) is a dedicated rebuild and maintenance solution for Magnafuel/Magnaflow ProStar 500 electric fuel pumps with integrated filters. This OEM-specification seal kit contains all internal sealing components required to restore pump integrity and fuel delivery performance after extended service or when seal degradation compromises flow consistency and pressure stability.

ProStar 500 pumps are engineered for high-flow fuel delivery in performance and race applications where demand exceeds factory supply capacity. Over time, internal rubber and elastomer seals experience hardening and wear from fuel exposure, temperature cycling, and operational stress. This rebuild kit addresses seal degradation without requiring pump replacement, preserving the original pump investment while restoring OEM performance parameters. Proper seal replacement maintains fuel atomization, prevents bypass leakage, and ensures stable pressure output across the full operating rpm range.

This kit is essential for builders and technicians maintaining Magnafuel ProStar 500 systems in street performance, racing, and custom fuel system installations. Routine seal replacement every 2–3 years of active use prevents fuel leakage, maintains pump efficiency, and prevents cavitation-induced noise and wear. The compact kit design (3.75 × 3.8 inches) ships efficiently and stores conveniently alongside pump maintenance tools and documentation.

Magnafuel's ProStar platform is recognized within the performance fuel systems market for consistent quality and reliability across street and track environments. Using genuine OEM seal components ensures compatibility with pump internals and preserves warranty protection where applicable.