Stage X Fuel Pressure Regulator Replacement Diaphragm

Replacement diaphragm for Stage X performance fuel pressure regulators, restoring like-new response, pressure stability and long-term durability.

It is made from high-grade fluorosilicone, which resists heat, fuel additives and long-term pressure cycling, and performs consistently on both gasoline and methanol. This suits high-output Subaru builds and motorsport use.

The diaphragm maintains the accuracy of the regulator's Advanced Bypass Technology, keeping fuel pressure stable across the full operating range, preventing pressure creep and supporting the efficiency of the fuel system.

Each diaphragm is laboratory tested and matches the original part used in Stage X regulators.