FUELAB® 5010x Series Fuel Pressure Regulators are designed with performance and flexibility in mind. They accept port style and non-port style union fittings without interference. The 5010x Series Fuel Pressure Regulator has a -6AN return port located on the bottom. Use with our Velocity Series 200 GPH lift pump for greater ability to maintain fuel pressure on demand, supporting up to 1500 HP.