Replaement Diaphram For MP-9940/9950 Regulators

The replacement diaphragm for MP-9940/9950 regulators is an OEM-equivalent service part designed for Magnafuel and Magnaflow fuel pressure regulator systems. This diaphragm is essential for users who maintain high-performance fuel delivery systems in performance vehicles, custom engines, and specialized automotive applications. When a regulator diaphragm becomes worn, cracked, or develops a fuel leak, replacement is critical to restore proper fuel pressure regulation and prevent fuel system failure.

The diaphragm operates as the pressure-sensing membrane inside the regulator assembly, translating manifold vacuum changes into precise fuel pressure adjustments. This component must withstand repeated cycles of fuel exposure and pressure fluctuation while maintaining a perfect seal to prevent vapor leaks and maintain system integrity. The compact design—measuring 3.8 by 0.3 by 3.8 inches and weighing just 0.02 pounds—fits directly into the MP-9940 and MP-9950 regulator housings without modification, ensuring factory-correct performance and fuel delivery accuracy.

Technicians and enthusiasts performing routine maintenance or diagnosing fuel pressure inconsistencies will find this replacement diaphragm compatible exclusively with Magnafuel MP-9940 and MP-9950 regulator models. Installation is straightforward—the diaphragm simply replaces the worn original component without requiring special tools or regulator recalibration. This OEM-specification part is ideal for shops, DIY builders, and performance tuners who depend on Magnaflow/Magnafuel regulators for consistent, reliable fuel system operation.