Holley Fuel Pressure Regulator; 12-845 & 12-847 REGULATOR REBUILD KIT

Rebuild a Broken Regulator. Fuel pressure regulators help maintain a steady flow of fuel pressure through your injectors to respond to changes in the air intake. For example, your regulator features a spring and diaphragm to control your bypass valve and open and close in response to changes in air pressure to force your fuel pump to inject more or less fuel. However, when these components wear or your regulator breaks, your engine will be able to compensate for changes in air pressure to supply the necessary fuel. That’s why Holley offers the Mustang Fuel Pressure Regulator Repair Kit with a diaphragm and spring to get your fuel pressure regulator functioning properly again.

Smooth Performance. Symptoms of a bad fuel regulator range from bad fuel economy and acceleration to engine misfires that can be damaging. Fortunately, repairing a broken fuel pressure regulator with this repair kit from Holley will get your engine functioning at its best again and running at an ideal fuel/ratio for better performance.

Easy Use and Setup. Holley offers everything you need to rebuild your fuel pressure regulator in no time, including a spring and diaphragm. They're fully customizable and pre-set at the factory to enable easy installation and use. Mount it to the end of your fuel rail or wherever your previous fuel regulator was positioned to get your Mustang running again.

Application. The Mustang Fuel Pressure Regulator is compatible with all carbureted Ford Mustang models and is designed for all Holley 12-845, 12-847, and 12847ERL Fuel Pressure Regulators.

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