SKU: HLY12-878
UPC: 090127734117
MPN: 12-878
The Replacement Regulator Kits EFI from Holley is an essential fuel system rebuild component for any serious fuel pressure regulator maintenance or restoration project. Whether you're rebuilding a failed regulator, refreshing fuel delivery precision on a modified EFI platform, or maintaining optimal fuel rail pressure in a high-performance application, this kit delivers the seals, springs, and internal components needed to restore your regulator to factory specifications. Fuel pressure regulators are critical to engine performance—they maintain consistent fuel delivery across varying engine loads and RPM ranges, and their internal components wear over time, compromising fuel economy and throttle response.
This rebuild kit includes all necessary replacement internals engineered to OEM tolerances, ensuring smooth regulator operation and reliable fuel pressure holding. Holley's precision engineering means each component—diaphragm seals, adjustment springs, and valve seats—is manufactured to exact specifications that match the original equipment, restoring regulator responsiveness without guesswork. The compact, lightweight design (0.08 lbs) makes installation straightforward for technicians working on fuel systems where regulator accessibility may be limited. By replacing internal wear items rather than the entire regulator assembly, you preserve your existing mounting, fuel line fittings, and wiring connections while achieving like-new performance at a fraction of replacement cost.
This kit is ideal for mechanics and enthusiasts maintaining EFI vehicles experiencing fuel delivery hesitation, hard starting, or pressure instability that traces back to regulator degradation. It's equally valuable for performance builders refreshing fuel systems on carbureted-to-EFI conversions or tuned vehicles where regulator drift could affect fuel trim and engine management calibration. Installation requires basic fuel system knowledge and proper pressure-relief procedures; verify compatibility with your specific Holley regulator model before ordering. For stock and modified applications alike, this Replacement Regulator Kits EFI restores precision fuel delivery and extends the service life of your fuel management system.
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