Maintain precise fuel pressure between 4.5 and 9 PSI to optimize engine performance and fuel efficiency. This Holley regulator features dual 3/8 NPT outlets for versatile fuel system integration, all within a compact 9.1 cm x 9.1 cm profile. Discover how this regulator ensures stable fuel delivery under varying conditions.

Restore precise fuel pressure control with this Holley regulator diaphragm kit designed specifically for 12-803 and 12-804 regulators. Measuring 17.80 cm in length, it ensures an exact fit for reliable performance. Improve your fuel system's consistency and efficiency—read on for full details.

Ensure precise fuel pressure control with the Holley Carburettor By-Pass Style Fuel Pressure Regulator, designed to maintain optimal engine performance. Compact at 8.9 cm in length and width, it fits efficiently within your fuel system setup. Discover how this 0.41 kg regulator enhances fuel delivery stability for superior engine response.