The best in-tank fuel pump for an LS swap depends on your fuel-pump hanger, required pressure, and engine setup. For many 1982–1995 GM TBI conversions, a 58-PSI EP381-style replacement is the most direct option. A 340LPH hanger is better suited to specified 1973–1991 Square Body trucks, while the EVIL ENERGY 255LPH pump offers a higher-flow pump option for 12V gasoline EFI systems. Compare fitment and flow details before ordering.
| Product | Best For | Key Detail |
|---|---|---|
| TBI to LS Swap 58-PSI Pump | EP381-style replacements | 164 LPH at 45 PSI |
| EVIL ENERGY 255LPH Pump | Higher-flow EFI setups | Gasoline, 12V DC |
| Lanotech 340LPH Hanger | 1973–1991 Square Body swaps | 58-PSI-rated hanger |
| UEANAZZ EP381 Pump | 1982–1995 GM TBI hangers | 58 PSI |
| Lanotech 58-PSI Drop-In Pump | 1982–1995 GM TBI vehicles | Includes installation components |
TBI to LS Swap 58-PSI Fuel Pump
This pump is best for builders converting a GM TBI fuel system to an LS engine who need a pump designed around 58-PSI operation. Its listed engine applications include LM7, LR4, L33, LC9, LQ4, LS1, LS2, LS3, and LS6. It is also described as a replacement for AC Delco EP381 and as fitting a stock in-tank hanger assembly.
The listed flow is 164 LPH at 45 PSI and 145 LPH at 60 PSI. Those figures make it useful for comparing the pump with an engine’s fuel demands, but they do not establish capacity for every build. Choose this if EP381 replacement and listed LS compatibility match your setup. Confirm the hanger and electrical connections before installation.
EVIL ENERGY 255LPH EFI Pump
This pump is best for a buyer seeking more listed flow than the 164-LPH EP381-style choices, provided the installation suits a 12V DC EFI system. The manufacturer lists 255 LPH at 43 PSI and 190 LPH at 80 PSI, with an operating pressure range of 15–90 PSI. Final fuel pressure is set by the regulator, so the pump alone does not guarantee the engine receives its target pressure.
Choose this option when the flow specifications fit the build and the fuel system uses gasoline. The listing cautions that high-impurity fuel may reduce pump life and affect performance. Verify hanger fit, hose connections, regulator arrangement, and the vehicle’s fuel-system requirements; the supplied details do not specify particular vehicle fitments.
Lanotech 340LPH Square Body Hanger
This product is best for an EFI LS or LT swap in the listed 1973–1991 Square Body trucks. Its stated applications include C10, K10, R10, C20, K20, R20, C30, K30, R30, V10, V20, and V30. The hanger is rated at 58 PSI and is listed with a 340LPH pump, making it a complete hanger-focused alternative to replacing only a pump motor.
The design is intended to avoid failure-prone splices and solder joints inside the tank, and the listing says it avoids compression fittings. Choose this if your truck and fuel-system setup match the specified application. It is not presented as a universal hanger, so verify the exact vehicle and tank configuration before buying.
UEANAZZ EP381 58-PSI Pump
This is best for a TBI-to-LS conversion where the existing fuel-pump hanger is from a listed 1982–1995 GM truck, van, or SUV. The pump is described as an in-tank replacement for GM TBI hangers and is intended to provide the 58 PSI required by the specified LS applications. Listed engines include LM7, LR4, L33, LC9, LQ4, LQ9, L92, LS1, LS2, and LS6.
Choose this option when the 58-PSI target and hanger replacement approach suit your project. The product information advises verifying the application before ordering and does not provide a flow-rate figure. That makes it harder to compare capacity against a high-demand build using flow data alone.
Lanotech 58-PSI TBI Drop-In Pump
This pump is best for owners of 1982–1995 GM TBI vehicles who want a replacement designed for the factory hanger without cutting or splicing. The listing says the package includes the pump, fuel filter, strainer, tank seals, and stainless-steel clamps. It is specified for 58 PSI and lists flow of 164 LPH at 45 PSI and 145 LPH at 60 PSI.
The manufacturer states that the pump supports up to 500 horsepower in naturally aspirated applications. It also notes use with a C5 Corvette regulator/filter or a rail-mounted regulator. Choose this if the vehicle range and included components match your needs. Verify regulator arrangement and the exact hanger fit; the stated horsepower figure applies to naturally aspirated applications, not every engine configuration.
Buying Guide: How To Choose An In-Tank LS Swap Pump
Does the pump provide the pressure your LS setup needs?
Several products here are designed around 58 PSI, a specification stated for LS applications in their listings. Check the engine and regulator requirements for your specific swap rather than relying on the pump label alone. A pump’s operating range and the regulated pressure delivered to the engine are different considerations.
Should you replace the pump or the whole hanger?
A pump-only replacement can make sense when the existing hanger fits and remains suitable for the build. A complete hanger, such as the specified Square Body unit, may be more appropriate when changing the tank-side assembly or avoiding in-tank splices. Confirm tank, vehicle, and hanger fitment before selecting either approach.
How much flow should you compare?
Compare flow at a pressure close to your system’s operating conditions. A pump’s flow generally differs at different pressures, as shown by the listed 164 LPH at 45 PSI and 145 LPH at 60 PSI on two options here. Do not compare headline flow figures without checking their stated pressure and other conditions.
What fuel and electrical details matter?
Check whether the pump is intended for gasoline, the required electrical supply, and the installation’s wiring and connections. The EVIL ENERGY 255LPH listing specifies gasoline and 12V DC EFI use. Also consider fuel cleanliness, since that product’s listing warns that high-impurity fuel can affect performance and pump lifespan.
Frequently Asked Questions
What fuel pressure is commonly listed for these LS swap pumps?
Several products in this comparison are specified for 58 PSI. Confirm the pressure requirement for the engine and regulator in your particular fuel system.
Can an EP381-style pump work for a TBI-to-LS swap?
The EP381-style products listed here are marketed for TBI-to-LS conversions and 58-PSI LS applications. Verify your hanger and vehicle fitment before ordering.
Is a higher LPH rating always better?
No. Select flow based on engine demand and the pressure at which the pump must operate. A higher-flow pump must also suit the hanger, regulator, fuel, and electrical setup.
When should I choose a complete fuel-pump hanger?
Choose a complete hanger when its stated vehicle fitment matches your truck and you need the hanger assembly rather than a pump-only replacement. The Lanotech 340LPH hanger is listed for specified 1973–1991 Square Body trucks.
Do these products fit every GM vehicle?
No. The listings identify specific vehicle ranges, hangers, or applications. Check the product’s stated fitment against the vehicle, tank, and existing fuel system.