{"product_id":"jdmspeed-255lph-high-flow-external-inline-fuel-pump-gsl392-400-939-replacement-all-metal-with-installation-kit","title":"JDMSPEED 255LPH High Flow External Inline Fuel Pump — GSL392\/400-939 Replacement, All-Metal with Installation Kit","description":"\u003cp\u003e\u003cstrong\u003eJDMSPEED 255LPH High Flow External Inline Fuel Pump is a universal, high-pressure replacement for GSL392\/400-939 that delivers up to 255 liters per hour and supports performance builds up to about 650 HP.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis external inline fuel pump by JDMSPEED is built as a direct-fit performance upgrade or replacement for GSL392 (400-939) style pumps. It arrives as a fully metal-shelled unit with an installation kit that includes barbed fittings, electrical connectors, mounting hardware and cushions so you can mount it outside the tank and tune final pressure with a regulator. The pump is specified for 12V input, rated at 255 LPH, and operates across a broad pressure band when paired with an external regulator.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this pump improve fueling on modified engines?\u003c\/h3\u003e\n\u003cp\u003eThe higher 255 LPH flow gives a larger margin for injectors and fuel delivery on turbocharged or supercharged engines compared with many OEM pumps. It reduces the risk of fuel starvation at high RPM and supports richer fueling for high power applications when combined with proper fuel lines and a regulator.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e255 liters per hour flow rate for higher-demand systems\u003c\/li\u003e\n  \u003cli\u003eSuitable for turbo, supercharged and heavily modified EFI setups\u003c\/li\u003e\n  \u003cli\u003eAll-metal body resists heat and mechanical wear\u003c\/li\u003e\n  \u003cli\u003eSupports fuels including gasoline, pump gas, race gas, diesel, E85 and ethanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the installation kit and how easy is fitment?\u003c\/h3\u003e\n\u003cp\u003eThe included kit contains everything needed to mount and wire the pump for most universal installations outside the tank. Because the kit provides hose barbs, crush washers, electrical connectors, clamps and a mounting cushion, basic mechanical skills and common tools are usually enough for a secure install.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1x JDMSPEED GSL392-style external fuel pump\u003c\/li\u003e\n  \u003cli\u003e2x 3\/8\" hose barb fittings, 2x crush washers, 2x electrical connectors\u003c\/li\u003e\n  \u003cli\u003e2x starlock washers, 2x nuts, 2x mounting clamps, 1x mounting cushion\u003c\/li\u003e\n  \u003cli\u003eMounts externally—final pressure set by a separate regulator\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat pressures and fuels are supported, and do I need a regulator?\u003c\/h3\u003e\n\u003cp\u003eThe pump is capable of operating across a wide pressure range; final system pressure must be controlled by an external regulator. It is compatible with a wide range of fuels, but vehicle wiring and supply voltage will affect delivered flow.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOperating pressure range: 15–120 PSI (final pressure set via regulator)\u003c\/li\u003e\n  \u003cli\u003eMinimum supply voltage: 12V; voltage affects flow output\u003c\/li\u003e\n  \u003cli\u003eFuel compatibility: gasoline, pump\/race gas, diesel, E85 and ethanol\u003c\/li\u003e\n  \u003cli\u003eRecommended: quality external regulator and proper fuel lines for high-pressure use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this pump a direct replacement for GSL392 or will I need modifications?\u003c\/h3\u003e\n\u003cp\u003eJDMSPEED designed this unit as a universal GSL392\/400-939 style replacement, matching the common form and inlet\/outlet positions for inline external installs. Most users will mount it with the supplied clamps and fittings, but verify electrical connections and fuel line sizes to match your vehicle’s layout.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces part numbers: GSL392-400-939, GSL392400939, GSL392, 400-939\u003c\/li\u003e\n  \u003cli\u003eUniversal external mount fits the majority of EFI applications\u003c\/li\u003e\n  \u003cli\u003eAll-metal inlet and outlet—use correct hose and clamp sizes\u003c\/li\u003e\n  \u003cli\u003eCheck wiring polarity and fusing for safe installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This JDMSPEED 255LPH external inline pump is aimed at enthusiasts, tuners and mechanics upgrading fuel delivery for higher horsepower naturally aspirated, turbocharged or supercharged engines. It’s appropriate for anyone replacing a failing GSL392-style pump, building a high-flow EFI fuel system, or needing a robust universal external pump that accepts multiple fuel types. Ensure you pair the pump with a proper fuel pressure regulator, correct wiring and compatible fuel lines for safe, reliable operation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this pump work with E85 fuel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The JDMSPEED pump supports E85, ethanol and other listed fuels, but verify hoses and seals are ethanol-compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a regulator with this pump?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This external pump requires an external fuel pressure regulator to set final system pressure between recommended ranges.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JDMSPEED","offers":[{"title":"Default Title","offer_id":55171351511383,"sku":"B07JJVZ86K","price":61.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/jdmspeed-pump-front-view_e3545492-10d8-44e6-8a9d-bdd31516f11e.jpg?v=1790443611","url":"https:\/\/britishgarage.co.uk\/products\/jdmspeed-255lph-high-flow-external-inline-fuel-pump-gsl392-400-939-replacement-all-metal-with-installation-kit","provider":"British Garage","version":"1.0","type":"link"}