Best Fuel System For Ls Swap: Kits Compared

Best Fuel System For Ls Swap

A strong LS-swap fuel system delivers the pressure and components your EFI setup requires, making a pump-and-regulator kit a practical choice for builders who need to replace more than the fuel lines. This roundup compares ten options, from complete 300 LPH pump kits to 6AN hose-and-regulator packages and individual components. Several products specify a 58 PSI regulator, while pump capacity ranges from 255 to 300 LPH among the listings that state a figure.

The right fit depends on whether your build needs a new pump, custom-length hose, or a regulator that connects to existing plumbing. Check the engine and fuel compatibility details before ordering: one hose listing excludes E85 and ethanol, and several products describe fitment only for select applications.

The Codeforge 300LPH Pump Kit leads because it combines a 300 LPH external pump, a 58 PSI regulator with a 10-micron filter, and several AN6 quick-disconnect adapters. Its listing says it is for select 4.8L, 5.3L, and 6.0L GM LS V8 engines. That makes it a strong all-in-one choice when you need a pump and fuel-pressure control together.

Confirm the adapters, engine fit, and fuel requirements against your specific swap before buying.

Our Top Picks

Codeforge 300LPH Pump KitBest Overall

Codeforge 300LPH Pump Kit

Combines a 300 LPH pump, 58 PSI 10-micron filter regulator, and AN6 adapters; the listing names select 4.8L, 5.3L, and 6.0L LS engines.

View on Amazon
EVIL ENERGY 300LPH Pump KitHigh-Flow Pump

EVIL ENERGY 300LPH Pump Kit

Pairs a 300 LPH external pump with a 58 PSI regulator and 10-micron filter, targeting LS swaps and EFI conversions.

View on Amazon
YEHERIT 25FT Hose KitLongest Hose

YEHERIT 25FT Hose Kit

Includes 25 feet of 6AN EFI hose, fittings, and a 58 PSI regulator, providing a longer stated hose run than the other hose kits.

View on Amazon

Compare fuel-system kits by setup and included components

#ProductWeightCompatible with Vehicle TypeMaterialBuy
14.1 lbCar, Light Truck, SUV, Truck, VanMetal, PlasticView on Amazon
21.7 kg——View on Amazon
32.14 kgPassenger CarStainless SteelView on Amazon
4
EVIL ENERGY 20FT Hose Kit4. EVIL ENERGY 20FT Hose KitPressure-Rated Hose
1.82 kg—Cpe Nylon, 304 Stainless Steel, Cpe Rubber…View on Amazon
5
CNARQR 6AN Fuel Line Kit5. CNARQR 6AN Fuel Line KitCustom 20-foot fuel routing
1.8 kg——View on Amazon
6
Yinlowa 255LPH Pump Kit6. Yinlowa 255LPH Pump KitCompact inline pump kit
0.92 kgPassenger CarMetalView on Amazon
7
Yezoauto 255LPH Pump Kit7. Yezoauto 255LPH Pump KitGSL392 replacement pump kit
2.3 lb—PlasticView on Amazon
8
SENJWARM 58 PSI Regulator8. SENJWARM 58 PSI RegulatorRegulator for return-style EFI
0.3 kgLS Swap EFI Conversion C5 Corvette 5.3 Chevy…MetalView on Amazon
9
UEANAZZ EP381 Fuel Pump9. UEANAZZ EP381 Fuel PumpTBI-to-LS pump replacement
0.35 kgTBI to LSx Swap Fuel Pump, Chevrolet Tahoe…MetalView on Amazon
10
Holley EFI Fuel System Kit10. Holley EFI Fuel System KitHolley vapor-guard return kit
7 lb—PlasticView on Amazon

Detailed Reviews: Best Fuel System For Ls Swap

Codeforge 300LPH Pump Kit

#1 · Best Overall

1. Codeforge 300LPH Pump Kit

  • Weight: 4.1 lb
  • Compatible with Vehicle Type: Car, Light Truck, SUV, Truck, Van
  • Material: Metal, Plastic

Best for: 300 LPH LS EFI package.

Why it ranks #1: Combines a 300 LPH pump, 58 PSI 10-micron filter regulator, and AN6 adapters; the listing names select 4.8L, 5.3L, and 6.0L LS engines.

The 300 LPH, 12V external inline pump is paired with a 58 PSI regulator for a consolidated LS EFI fuel-supply package. Its 10-micron filter and AN6 quick-disconnect adapters address fuel cleanliness and connection options, while the listing names select 4.8L, 5.3L, and 6.0L GM LS V8 engines.

The 12V pump is rated up to 300 LPH, and the regulator maintains the stated 58 PSI, bringing supply and pressure control together for the listed EFI use. A 10-micron filter element supports cleaner flow to EFI components. The included AN6 adapters cover 5/16-inch and 3/8-inch quick-disconnect connections, which can help match listed connection types during installation. The product title limits its engine fitment to select 4.8L, 5.3L, and 6.0L GM LS V8s.

Pros
  • 12V external inline pump rated up to 300 LPH
  • 58 PSI fuel filter regulator
  • Integrated 10-micron filter element
  • AN6 quick-disconnect adapters included
Cons
  • The stated engine fitment covers select 4.8L, 5.3L, and 6.0L GM LS V8s.

Skip it if you have an engine outside the listed select 4.8L, 5.3L, and 6.0L GM LS V8 fitment; the title does not establish broader compatibility.

This is a match for a listed GM LS V8 EFI conversion needing a 300 LPH external pump, 58 PSI regulation, and AN6 quick-disconnect adapters. Check the select engine fitment before planning the installation.

Full product details
BrandCodeforge
Body MaterialMetal
Compatible with Vehicle TypeCar, Light Truck, SUV, Truck, Van
Included Components1 x 300LPH External Inline Electric Fuel Pump;, 1 x 58 PSI Fuel Filter Regulator Kit;, 1 x AN6 to 5/16-Inch Quick Disconnect; 2 x AN6 to 3/8-Inch Quick Disconnects; 1 x AN6 to 3/8-Inch EFI Quick Disconnect Fitting, 1 x Fuel Pump Mounting Bracket;, 1 x M12 x 1.5 to AN6 Adapter; 1 x AN10 to M18 x 1.5
Item Dimensions9.4 x 8.5 x 4.1 inches
Item Weight4.1 pounds
Dimensions9.4 x 8.5 x 4.1 inches
ManufacturerCodeforge
Part Number8972519740, 97251974
Manufacturer Warranty Description1 Year
MaterialMetal, Plastic
Model Number8972519740, 97251974
Operation ModeAutomatic
Outlet Connection Size6 millimeters
Product StyleIn-Line

Listed on Amazon as: 58 PSI Fuel Filter Regulator & 300LPH Electric Inline Fuel Pump Kit, 12V LS Swap EFI Fuel System for Select 4.8L 5.3L 6.0L GM LS V8 Engines, with AN6 Adapters

View on Amazon
EVIL ENERGY 300LPH Pump Kit

#2 · High-Flow Pump

2. EVIL ENERGY 300LPH Pump Kit

  • Weight: 1.7 kg

Best for: High-flow pump and regulator.

Why it ranks #2: Pairs a 300 LPH external pump with a 58 PSI regulator and 10-micron filter, targeting LS swaps and EFI conversions.

A 300 LPH external inline pump paired with a 58 PSI regulator gives LS EFI builders a combined supply and pressure-control package. The integrated 10-micron filter element also addresses fuel cleanliness in the same assembly, with the listing identifying compatibility with 4.8L, 5.3L, and 6.0L V8 engines.

The pump’s stated maximum flow of 300 LPH at 13.5V suits buyers seeking a higher-flow external supply, while the 58 PSI regulator provides the pressure setting specified for the LS EFI application. Its integrated 10-micron filter element supports cleaner fuel delivery to the engine. Because the listing names 4.8L, 5.3L, and 6.0L V8 compatibility, buyers with other engine sizes should not assume the same fitment from these details.

Pros
  • 300 LPH maximum flow at 13.5V
  • 58 PSI fuel pressure regulation
  • Integrated 10-micron filter element
  • Listed for 4.8L, 5.3L, and 6.0L V8 engines
Cons
  • Listed engine compatibility is limited to 4.8L, 5.3L, and 6.0L V8s.

Skip it if you are fitting an engine outside the listed 4.8L, 5.3L, and 6.0L V8 range; this listing does not establish its compatibility.

This package suits an LS EFI builder seeking an external 300 LPH pump, 58 PSI regulation, and a fine filter element together. Keep its stated 4.8L, 5.3L, and 6.0L V8 fitment in view.

Full product details
BrandEVIL ENERGY
Item Dimensions9.45 x 3.94 x 8.27 inches
Item Weight1.7 kg
Dimensions9.45 x 3.94 x 8.27 inches
ManufacturerSpeedwow Tuning
Part NumberEV2300113BK000L

Listed on Amazon as: EVIL ENERGY 58 PSI Fuel Filter Regulator with External High Flow 300LPH Electric Inline Fuel Pump Compatible with LS Swap EFI Conversions (Fits 4.8L/5.3L/6.0L V8)

View on Amazon
YEHERIT 25FT Hose Kit

#3 · Longest Hose

3. YEHERIT 25FT Hose Kit

  • Weight: 2.14 kg
  • Compatible with Vehicle Type: Passenger Car
  • Material: Stainless Steel

Best for: Long hose C5 Corvette setup.

Why it ranks #3: Includes 25 feet of 6AN EFI hose, fittings, and a 58 PSI regulator, providing a longer stated hose run than the other hose kits.

A 25-foot 6AN EFI hose gives this 58 PSI regulator kit extra reach for routing in a C5 Corvette or another stated LS swap application. The included 6AN fittings complete the listed hose-and-regulator package, helping installers handle the line connections as part of one setup.

The 25-foot 6AN EFI hose gives an installer a substantial length for custom routing, while the 6AN fittings are included for making the listed connections. Its stainless steel filter regulator is specified to maintain 58 PSI, joining fuel filtration and pressure regulation in the package. The title names C5 Corvette compatibility, and the description identifies LS swaps; the listed components do not include a fuel pump, so pump selection remains a separate planning step.

Pros
  • 25-foot 6AN EFI fuel hose
  • 58 PSI fuel pressure regulation
  • 6AN fittings included
  • Stainless steel filter regulator
Cons
  • A fuel pump is not listed in the kit components.

Skip it if you need the pump included with your hose and regulator; the EVIL ENERGY 300 LPH pump-and-regulator package combines a pump with pressure control.

This fits a C5 Corvette or LS swap project needing a long 6AN hose, fittings, and 58 PSI regulation. Choose it when you already have a pump or will source one separately; the listing does not include one.

Full product details
BrandYEHERIT
Compatible with Vehicle TypePassenger Car
Item Weight2.14 kg
ManufacturerYEHERIT
Part NumberAFH-25FTAN6-58
Manufacturer Warranty Description1 year
Model NumberAFH-25FTAN6-58
Outer MaterialStainless Steel
StyleModern
Style NameModern

Listed on Amazon as: 58 PSI LS Swap Fuel Filter Regulator with 25FT 6AN EFI Fuel Hose & 6 AN Fittings Compatible With C5 Corvette

View on Amazon
EVIL ENERGY 20FT Hose Kit

#4 · Pressure-Rated Hose

4. EVIL ENERGY 20FT Hose Kit

  • Weight: 1.82 kg
  • Material: Cpe Nylon, 304 Stainless Steel, Cpe Rubber…

Best for: Long-run LS swap plumbing.

Why it ranks #4: Includes 20 feet of 6AN hose and a 58 PSI filter regulator; its listed maximum working pressure is 750 psi, but it excludes E85 and ethanol.

The 20-foot, 6AN braided hose gives LS swap and EFI installers room to route a fuel line around a custom engine bay. Its included 58 PSI filter regulator brings pressure control into the same kit, while the hose is also specified for oil-cooling applications.

The 20-foot hose supports longer or more flexible routing than a short pre-formed line, and its 6AN format suits the stated LS swap and EFI applications. A 58 PSI filter regulator combines pressure regulation and fuel filtering in the listed kit, simplifying the parts choice for a fuel-injection setup. The braided nylon and stainless construction is specified for gasoline and diesel, while the stated exclusion of E85 and ethanol is important when choosing fuel.

Pros
  • 20-foot 6AN braided hose
  • 58 PSI filter regulator included
  • Specified for LS swaps and EFI conversions
  • Hose is compatible with gasoline and diesel
Cons
  • Not compatible with E85 or ethanol.

Skip it if you plan to run E85 or ethanol; this hose kit explicitly excludes both fuels.

Choose this for an LS swap or EFI conversion needing a long 6AN run and a 58 PSI filter regulator in one kit. Its stated fuel compatibility excludes E85 and ethanol, so fuel choice is a key boundary.

Full product details
BrandEVIL ENERGY
ColorBlack
Item Dimensions L x W300"L x 0.56"W
Item Weight1.82 kg
ManufacturerEVIL ENERGY
MaterialCpe Nylon, 304 Stainless Steel, Cpe Rubber, Aluminum Alloy
Dimensions300"L x 0.56"W

Listed on Amazon as: EVIL ENERGY 6AN LS Swap Fuel Line Kit 20FT CPE Hose 58PSI Filter Regulator

View on Amazon
CNARQR 6AN Fuel Line Kit

#5

5. CNARQR 6AN Fuel Line Kit

  • Weight: 1.8 kg

Best for: Custom 20-foot fuel routing.

Why it ranks #5: Supplies 20 feet of hose, a full AN fitting set, and a 58 PSI regulator with a 10-micron filter for custom LS-swap plumbing.

A 20-foot hose and full AN fitting set give this CNARQR kit flexibility for custom fuel-line routing during an LS swap. Its integrated 58 PSI filter regulator includes a 10-micron filter, combining pressure control and fuel filtering with the parts for the line run.

The 20-foot hose allows installers to shape a custom route, and the full AN fitting set is included to support that setup. The integrated regulator is specified at 58 PSI, while its 10-micron filter is described as helping prevent injector clogs by cleaning fuel. The listing states compatibility with standard gasoline and diesel, making fuel type a practical selection check; it does not establish compatibility with E85 or ethanol.

Pros
  • 20-foot fuel hose
  • Full AN fitting set included
  • Integrated 58 PSI filter regulator
  • 10-micron filter element
Cons
  • The supplied fuel compatibility details do not establish E85 or ethanol use.

Skip it if you need explicitly stated E85 or ethanol compatibility; the supplied fuel details list standard gasoline and diesel only.

Choose this for an LS swap needing a flexible 20-foot run, AN fittings, and integrated 58 PSI filtration and regulation. Its listed fuel compatibility covers standard gasoline and diesel, so verify that boundary against your intended fuel.

Full product details
BrandCNRAQR
ColorBlack
Item Weight1.8 kg
ManufacturerCNRAQR

Listed on Amazon as: CNARQR 6AN Fuel Line & 58 psi LS Swap Fuel Filter Regulator Kit

View on Amazon
Yinlowa 255LPH Pump Kit

#6

6. Yinlowa 255LPH Pump Kit

  • Weight: 0.92 kg
  • Compatible with Vehicle Type: Passenger Car
  • Material: Metal

Best for: Compact inline pump kit.

Why it ranks #6: Includes a 255 LPH inline pump, 58 PSI filter regulator, and adapters for 3/8-inch supply and 5/16-inch return connections.

A 255 LPH inline pump and 58 PSI filter regulator anchor this kit for LS swap fuel delivery. Its included adapters cover 3/8-inch supply, 5/16-inch return, and a 6AN-to-3/8-inch connection, giving installers several named connection options while assembling a return-style system.

The external inline pump is paired with a 58 PSI fuel filter regulator, combining the two main listed fuel-system components in one kit. Included 3/8-inch fuel-line and 5/16-inch return-line adapters provide specific connection sizes, while the 6AN-to-3/8-inch adapter offers another stated interface. Those parts can help organize a custom installation, but the supplied details do not specify a hose length or a complete fuel-line set, so plan plumbing separately.

Pros
  • 255 LPH inline fuel pump
  • 58 PSI fuel filter regulator included
  • 3/8-inch fuel-line and 5/16-inch return adapters
  • 6AN-to-3/8-inch adapter included
Cons
  • A fuel hose is not listed among the included components.

Skip it if you need a listed hose and full line-routing kit; the EVIL ENERGY 20-foot 6AN hose kit supplies a specified hose length.

Consider this for a custom LS swap needing an inline pump, regulator, and the listed line adapters. It is a component kit rather than a stated hose-length package, so plan the fuel-line routing and hose separately.

Full product details
BrandYinlowa
Compatible with Vehicle TypePassenger Car
Included Components3/8 Inch Fuel Line Adapter, 5/16 Inch Return Line Adapter, 58 PSI Fuel Filter Regulator, 6AN to 3/8 Inch Adapter, External Inline Fuel Pump
Item Weight0.92 kg
ManufacturerYinlowa
Part Number80005700
Manufacturer Warranty DescriptionOne-Year Limited Warranty
Model Number80005700
Outer MaterialMetal
Style NameInline Fuel Pump Kit

Listed on Amazon as: 255LPH Inline Fuel Pump Kit, Replaces GSL392, 58 PSI LS Swap

View on Amazon
Yezoauto 255LPH Pump Kit

#7

7. Yezoauto 255LPH Pump Kit

  • Weight: 2.3 lb
  • Material: Plastic

Best for: GSL392 replacement pump kit.

Why it ranks #7: Targets LS-swap EFI conversion and includes an inline pump, installation kit, 6AN fitting, and 58 PSI filter regulator.

A 255 LPH high-pressure pump, install kit, and 6AN fitting are paired with a 58 PSI EFI filter regulator in this Yezoauto package. Its stated compatibility with Walbro TI GSL392 makes it a targeted option for LS swap fuel delivery rather than a generic line-only kit.

The 255 LPH pump is bundled with an install kit and 6AN fitting, giving installers several named parts for a pump-based fuel delivery setup. A 58 PSI EFI conversion filter regulator is also included by the title, bringing pressure control and filtration into the package. Compatibility is stated for Walbro TI GSL392, with GSL392 and 400-939 listed as interchange references. The listing does not specify a hose length, so plan the fuel-line route independently.

Pros
  • 255 LPH high-pressure EFI pump
  • Install kit included
  • 6AN fitting included
  • 58 PSI EFI filter regulator
Cons
  • No fuel-hose length is specified in the supplied details.

Skip it if you need a stated long hose for custom routing; the YEHERIT kit specifies a 25-foot 6AN EFI fuel hose.

Choose this for a pump-based LS swap setup when the 255 LPH rating, install kit, 6AN fitting, and 58 PSI regulator match your plan. Its listing names no hose length, so arrange line routing separately.

Full product details
BrandYezoauto
Body MaterialPlastic
Included ComponentsFuel Pump
Item Weight2.3 pounds
ManufacturerYezoauto
Part NumberHNH109
Manufacturer Warranty DescriptionOne Year Warranty
MaterialPlastic
Model NumberHNH109
Operation ModeAutomatic
Product StyleGerotor
StyleGerotor

Listed on Amazon as: 255LPH Inline LS Swap High Pressure EFI Fuel Pump w/Install Kit & 6AN Fitting & 58PSI EFI Conversion Fuel Filter Regulator for Walbro TI GSL392 400-939

View on Amazon
SENJWARM 58 PSI Regulator

#8

8. SENJWARM 58 PSI Regulator

  • Weight: 0.3 kg
  • Compatible with Vehicle Type: LS Swap EFI Conversion C5 Corvette 5.3 Chevy…
  • Material: Metal

Best for: Regulator for return-style EFI.

Why it ranks #8: Provides a 58 PSI filter regulator and inlet, return, and outlet fittings for LS-swap EFI conversion, but does not include a pump.

A 58 PSI fuel filter regulator with inlet, return, and outlet fittings gives this SENJWARM kit a focused role in LS swap EFI plumbing. Its included 3/8-inch inlet and 5/16-inch return push-on fittings, plus a 6AN outlet adapter, define the connection sizes supplied.

The metal filter regulator is listed for LS swap EFI conversion and C5 Corvette applications, with compatibility details naming several Chevrolet V8 displacements and LS engine families. Included fittings specify a 3/8-inch inlet, 5/16-inch return, and 6AN male-to-3/8-inch outlet, helping buyers compare the supplied connections with their fuel lines. The listing identifies a 58 PSI regulator, but its included components do not list a fuel pump, so it serves as plumbing and pressure-control hardware rather than a complete pump package.

Pros
  • 58 PSI fuel filter regulator
  • 3/8-inch inlet push-on fitting included
  • 5/16-inch return push-on fitting included
  • 6AN-to-3/8-inch outlet fitting included
Cons
  • A fuel pump is not listed among the included components.

Skip it if you need a pump in the same package; the Yezoauto 255 LPH kit lists a pump alongside its 58 PSI regulator.

Select this for an LS swap or compatible C5 Corvette setup when you need a 58 PSI filter regulator and the listed inlet, return, and outlet fittings. It does not list a pump, so source fuel supply separately.

Full product details
BrandSENJWARM
Compatible with Vehicle TypeLS Swap EFI Conversion C5 Corvette 5.3 Chevy Fuel Pressure Filter with Return AN-6 Fittings 3/8'' 5/16'' EFI Inlet Outlet Return Fuel Rail Adpater
Included Components1 x fuel filter/regulator, 1 x 3/8'' EFI push on lock fitting for inlet, 1 x 5/16'' EFI push on lock fitting for return, 1 x 6AN male to 3/8'' male push on EFI fitting for outlet.
Item Weight0.3 kg
ManufacturerSENJWARM
Part NumberSJ-Fuel Filter-LS
Manufacturer Warranty Description90 DAYS
Model NumberSJ-Fuel Filter-LS
Outer MaterialMetal
Style NameModern

Listed on Amazon as: 58 PSI fit Fuel Filter Regulator Kit for LS Swap EFI Conversion Corvette C5 5.3 Chevy Fuel Pressure Filter with Return AN-6 Fittings 3/8'' 5/16'' EFI Inlet Outlet Return Fuel Rail Adpater

View on Amazon
UEANAZZ EP381 Fuel Pump

#9

9. UEANAZZ EP381 Fuel Pump

  • Weight: 0.35 kg
  • Compatible with Vehicle Type: TBI to LSx Swap Fuel Pump, Chevrolet Tahoe…
  • Material: Metal

Best for: TBI-to-LS pump replacement.

Why it ranks #9: Specifically lists TBI-to-LS-swap use and includes a 58 PSI regulator, but the supplied components list only a fuel pump.

An EP381 fuel pump paired by title with a 58 PSI regulator targets GM TBI-to-LS swap fuel delivery. The listing names Chevrolet Tahoe, GMC Yukon, and GM models from 1982–1995 among its compatible applications, making this a vehicle-specific alternative to a hose-and-fitting kit.

This listing identifies the unit as an EP381 pump for GM TBI-to-LS swaps and states 58 PSI fuel pressure regulation in the title. Its compact listed dimensions of 5.91 by 2.36 by 2.95 inches may help buyers assess available installation space, while the specified compatible vehicles include Chevrolet Tahoe and GMC Yukon along with GM 1982–1995 models. The included-components field lists a fuel pump only, so the regulator and other plumbing parts should be checked against the package contents before planning the build.

Pros
  • EP381 pump listing for TBI-to-LS swaps
  • 58 PSI regulator identified in the title
  • Compatible models include Chevrolet Tahoe and GMC Yukon
  • Compact listed dimensions of 5.91 × 2.36 × 2.95 inches
Cons
  • The included-components list names only a fuel pump.

Skip it if you need a complete hose-and-fitting package; the YEHERIT 25-foot kit lists hose, 6AN fittings, and a 58 PSI regulator.

This suits a buyer evaluating an EP381 pump for a listed GM TBI-to-LS application, including Tahoe and Yukon models. The included-components field names the pump only, so account separately for the rest of the fuel system.

Full product details
BrandUEANAZZ
Body MaterialStainless Steel
Compatible with Vehicle TypeTBI to LSx Swap Fuel Pump, Chevrolet Tahoe, GMC Yukon, GM (1982-1995) models
Included ComponentsFuel Pump
Item Dimensions5.91 x 2.36 x 2.95 inches
Item Weight0.35 kg
Dimensions5.91 x 2.36 x 2.95 inches
ManufacturerOsias
Part Number360700
Manufacturer Warranty DescriptionLifetime Limited Warranty
MaterialMetal
Model Number360700
Operation ModeAutomatic

Listed on Amazon as: EP381 Fuel Pump for GM TBI to LS Swap with 58PSI Fuel Pressure Regulator

View on Amazon
Holley EFI Fuel System Kit

#10

10. Holley EFI Fuel System Kit

  • Weight: 7 lb
  • Material: Plastic

Best for: Holley vapor-guard return kit.

Why it ranks #10: The listing describes an EFI fuel-system kit with a return line, but does not specify LS-swap fitment, pump flow, or regulator pressure.

Holley’s Vapor Guard fuel system kit with return line gives EFI builders a named return-style system option from the brand’s listed fuel-system range. Its product details call out corrosion-resistant materials and easy installation, while the Gerotor style identifies the kit’s stated configuration.

The included Holley 526-7 Fuel System Kit is identified as a Vapor Guard kit with return line, making it relevant to buyers planning a return-style fuel-system layout. Holley specifies corrosion-resistant construction, which supports choosing it where material resistance matters, and describes installation as easy. The listing also calls the kit durable and long lasting. It does not provide a fuel-pressure figure or detailed connection sizes in the supplied facts, so those specifications remain important fit checks for an LS swap.

Pros
  • Vapor Guard fuel system kit
  • Return line identified in the title
  • Corrosion-resistant construction
  • Gerotor style listed
Cons
  • The supplied details do not state a fuel-pressure figure.

Skip it if you need a specified 58 PSI regulator and connection sizes; the EVIL ENERGY 20-foot hose kit names a 58 PSI filter regulator.

Consider this for an EFI builder seeking a Holley Vapor Guard kit with a return line and corrosion-resistant construction. The supplied listing omits pressure and connection-size details, so establish those requirements before choosing it for an LS swap.

Full product details
Brand‎Holley
Color‎No Color
Included Components‎Holley 526-7 Fuel System Kit
Item Dimensions LxWxH‎0.00 x 0.00 x 0.00 inches
Item Package Dimensions L x W x H‎14.26 x 12.48 x 9.42 inches
Item Weight‎7 pounds
Manufacturer‎Holley
Material‎Plastic
Model‎Holley 526-7 Fuel System Kit
Package Weight‎4.08 kg
Size‎No Size
Style‎Gerotor
Warranty Description‎Warranty

Listed on Amazon as: Holley EFI Fuel System Kit, Vapor Gaurd, W Return L

View on Amazon

Avoid a fuel-compatibility mismatch

Check the listed fuel compatibility before choosing a hose kit; the EVIL ENERGY 20FT Hose Kit explicitly excludes E85 and ethanol. That limitation matters even when its pressure figures look ample: the listing gives a 750 psi maximum working pressure and a 2,250 psi burst pressure, but those numbers do not establish compatibility with excluded fuels. The CNARQR 6AN Fuel Line Kit says it is compatible with standard gasoline and diesel, but the supplied details do not state E85 compatibility.

Do not infer ethanol suitability from a hose’s braided construction, AN fittings, or pressure rating. Verify the fuel type with the product maker and check every fuel-wetted component in the assembled system, including pump, regulator, fittings, and hose.

A system is only as suitable as its least-compatible component.

Match the regulator and fittings to the fuel rail

A 58 PSI regulator does not guarantee that a kit connects directly to your fuel rail; confirm the inlet, outlet, and return arrangement as well as the pressure requirement. The SENJWARM 58 PSI Regulator includes 3/8-inch inlet and 5/16-inch return push-on fittings plus a 6AN outlet adapter. The Yinlowa 255LPH Pump Kit also lists 3/8-inch supply and 5/16-inch return adapters, while the Codeforge 300LPH Pump Kit includes multiple AN6 quick-disconnect adapters.

These details can help identify likely plumbing needs, but they are not proof of fitment for every rail or vehicle. Compare the connection style and line sizes with the parts already installed on your engine, and confirm whether your system requires a return line.

How to Choose an LS-Swap Fuel System

Pump flow and engine demand

Look for a stated pump-flow figure that suits your engine’s requirements, and do not treat flow alone as proof of fit. The Yinlowa 255LPH Pump Kit and Yezoauto 255LPH Pump Kit name 255 LPH; the EVIL ENERGY 300LPH Pump Kit and Codeforge 300LPH Pump Kit specify 300 LPH. Codeforge also states support for naturally aspirated applications up to 750 hp and turbocharged applications, but confirm the full conditions with the manufacturer.

The 255 LPH options may suit buyers seeking that listed capacity, while the 300 LPH kits are the higher-flow choices in this set. Match pump capacity to your actual engine setup, fuel, and power target rather than selecting the largest number by default.

What the kit includes

Choose a package based on which fuel-system parts your swap still needs. The Codeforge 300LPH Pump Kit and EVIL ENERGY 300LPH Pump Kit combine a pump with a 58 PSI filter regulator, while the EVIL ENERGY 20FT Hose Kit and YEHERIT 25FT Hose Kit focus on hose, fittings, and regulation rather than a listed pump. The CNARQR 6AN Fuel Line Kit includes 20 feet of hose and a full AN fitting set.

If your existing pump works and you need new plumbing, a hose kit may be the closer match. If you are building the system from scratch, a pump-and-regulator package can consolidate more components, but check exactly which adapters and installation hardware are included.

Pressure and connection details

Confirm that the regulator pressure and adapter sizes match your EFI setup before ordering. Several products list a 58 PSI regulator, including the Codeforge 300LPH Pump Kit, EVIL ENERGY 300LPH Pump Kit, and SENJWARM 58 PSI Regulator. Connection details vary: the SENJWARM kit specifies a 3/8-inch inlet, 5/16-inch return, and 6AN outlet adapter, while the Yinlowa 255LPH Pump Kit lists 3/8-inch supply and 5/16-inch return adapters.

Buyers using those line sizes may find those details useful; those with different rail or line connections should verify compatibility and plan for the right fittings. A matching pressure figure alone does not establish that the regulator is a direct fit for your engine.

Which LS-Swap Fuel System Should You Choose?

Choose the Codeforge 300LPH Pump Kit if you need a pump, 58 PSI filter regulator, and multiple AN6 adapters in one package; its listing names select 4.8L, 5.3L, and 6.0L GM LS V8 engines. For a 300 LPH pump-and-regulator alternative, consider the EVIL ENERGY 300LPH Pump Kit. If your pump is already sorted and you need hose, fittings, and regulation, the YEHERIT 25FT Hose Kit offers the longest stated line, while the EVIL ENERGY 20FT Hose Kit specifies pressure ratings but excludes E85 and ethanol.

Choose the Yinlowa 255LPH Pump Kit when its listed 3/8-inch supply and 5/16-inch return adapters suit your plumbing. If you need only a regulator, the SENJWARM 58 PSI Regulator is the focused option.

Verify fitment and fuel compatibility before purchase.

Frequently Asked Questions

How do I choose the right fuel pump flow rate for my LS engine and power target?

Choose a pump based on your engine’s fuel demand at your intended power level, fuel type, and operating pressure—not the flow number alone. Check the pump’s flow data at the pressure your system requires, and confirm that the wiring, lines, and regulator suit the setup. The product titles alone do not establish a complete match.

Does a 58 PSI filter regulator work with my specific LS fuel rail and return setup?

Not necessarily; confirm compatibility with your fuel rail, plumbing, and return arrangement before buying. A 58 PSI rating alone does not establish that the regulator’s ports or adapters match your swap. Check the listing for the included fittings and verify their sizes and connection types against your actual fuel-system components.

Can I use an E85-compatible hose and pump with these fuel-system kits?

Only if the specific hose, pump, seals, and other fuel-wetted parts are confirmed compatible with E85. Do not infer compatibility from a kit’s general LS-swap description. The EVIL ENERGY 20FT hose kit title specifically excludes E85 and ethanol; verify fuel compatibility for every other kit directly before use.

How can I tell whether a kit’s adapters will fit my swap?

Compare each listed adapter’s size and connection type with the fuel rail, feed line, and return line on your vehicle. The Codeforge kit lists multiple AN6 quick-disconnect adapters, while the Yinlowa listing specifies 3/8-inch supply and 5/16-inch return adapters. Confirm those details match your plumbing before purchase.

Should I buy a complete pump kit or only a hose and regulator kit?

Choose a complete pump kit if you still need a pump and fuel-pressure control together; the Codeforge listing combines a 300 LPH pump, 58 PSI filter regulator, and AN6 adapters. If your pump is already sorted, a hose-and-regulator kit may better fit your needs. Check included components and fitment before deciding.

Final Words

For a combined pump-and-regulator setup, the Codeforge 300LPH Pump Kit is the lead choice because its listing includes a 58 PSI filter regulator and multiple AN6 adapters, and names select 4.8L, 5.3L, and 6.0L GM LS V8 engines. Consider the EVIL ENERGY alternative, hose kits, or a regulator-only option when those better match what your swap still needs. Verify fitment, adapters, and fuel compatibility before purchase.

Leave a Reply

Your email address will not be published. Required fields are marked *