Quantum Fuel System HFP brand fuel pressure regulators are direct drop in replacements for the original manufacturer part. Designed to restore your engine’s performance to original specifications, they are durable, reliable, and come with a LIFETIME replacement warranty. Precision designed with robust engineering for proper fuel pressure delivery, engine performance and resistance to leakage Application specific for the perfect fit every time Fuel pressure is preset to the vehicle’s factory specifications-the fuel supply pressure will be the same as it was at vehicle manufacture Meets or exceeds original equipment specifications in fit, form and function Provides consistent and predictable fuel pressure at all RPM levels