Description
EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style – Professional Overview
The EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style is a high-flow fuel delivery solution designed for engine swaps, fuel-system upgrades, and applications where an existing fuel tank needs to support a higher-performance engine.
Rather than requiring a dedicated EFI conversion tank or a complete conversion to a fuel cell, the retrofit module is designed to install into an existing fuel tank. Its adjustable installation depth accommodates tanks between 7.00 and 20.00 inches deep, providing flexibility across a wide range of custom and modified vehicle applications.
The pump delivers a 450 LPH / 119 GPH free-flow rate and has a maximum pressure rating of 100 psi. The supplied performance figures indicate support for approximately 1,000 HP EFI applications on pump or race gas, depending on the complete fuel-system configuration.
The system is designed around a return-style fuel arrangement and must be paired with an appropriate return-style regulator.
Installation and Fuel System Compatibility
This 450 LPH in-tank fuel pump is designed for applications where an existing fuel tank needs to be adapted for high-flow EFI or carbureted fuel delivery.
The module is designed for 7.00–20.00 inch tank depths, allowing it to accommodate different tank dimensions without requiring a dedicated EFI fuel tank.
The fuel connections include an 8AN flare outlet and a 6AN flare return connection. Both connections use male-thread attachments.
The design incorporates swivel banjo-style AN fittings, reducing overall protrusion from the tank and helping provide additional clearance between the fuel tank and vehicle body.
The pump must be used with a compatible return-style fuel pressure regulator. The supplied information identifies BPP13101BK and BPP13109BK for EFI applications and BPP13206BK for carbureted applications.
Fuel Delivery and Performance
The 450 LPH / 119 GPH free-flow rate provides substantially greater fuel-delivery capacity than a typical low-output retrofit pump.
The supplied performance figures identify approximate application capabilities of:
- EFI: Approximately 1,000 HP on pump or race gas
- EFI: Approximately 800 HP on E85
- Carbureted: Approximately 1,050 HP on pump or race gas
- Carbureted: Approximately 850 HP on E85
These figures are application estimates provided with the product information. Actual fuel-system capability depends on the complete system configuration, including fuel pressure, fuel lines, regulator, electrical supply, fuel type, and engine requirements.
The pump has a maximum pressure rating of 100 psi, while the system itself is intended to operate with an appropriate return-style regulator.
Construction and Connection Design
The retrofit module uses AN flare connections rather than NPT-style connections. The supplied description specifically highlights the use of AN fittings as part of the updated design.
The outlet uses an 8AN flare, while the return connection uses a 6AN flare. The swivel banjo-style design helps reduce the module’s overall protrusion from the fuel tank.
This lower-profile configuration is particularly useful where clearance between the fuel tank and vehicle body is limited.
The module is supplied as a kit, providing the primary components needed for the retrofit fuel-pump installation. The system still requires a compatible return-style regulator and an appropriate fuel-system setup.
Why This Fuel Pump Stands Out
The EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style is designed around a practical problem encountered during engine swaps: upgrading fuel delivery without replacing the existing fuel tank with a dedicated EFI tank.
Its 7–20 inch installation range, high-flow 450 LPH pump, AN connections, and reduced tank-side protrusion make it suitable for custom fuel-system projects.
The system can support both EFI and carbureted applications, including high-output engine combinations. Its return-style configuration also provides flexibility for fuel systems requiring regulated fuel pressure and continuous fuel return.
The supplied performance figures make the module relevant to high-horsepower applications, while the adjustable installation depth makes it adaptable to a broad range of existing tanks.
Who This Fuel Pump Is Best For
This 450 LPH return-style fuel pump is intended for buyers upgrading fuel delivery on high-performance vehicles, engine swaps, muscle cars, trucks, and custom automotive projects.
It is particularly relevant to EFI conversions, carbureted-to-EFI upgrades, high-horsepower engine builds, and applications where the existing fuel tank needs to be retained.
The module can also suit builders installing engines such as LS or Gen III Hemi combinations into vehicles that originally used carbureted fuel systems, provided the complete fuel system is correctly configured.
A compatible return-style regulator is required for operation.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style |
| Pump Type | In-Tank Retrofit Fuel Pump |
| Fuel System | Return Style |
| Free Flow Rate | 450 LPH / 119 GPH |
| Maximum Pressure | 100 psi |
| Outlet Attachment | Male Threads |
| Outlet Size | 8AN Flare |
| Outlet Quantity | One |
| Return Attachment | Male Threads |
| Return Size | 6AN Flare |
| Inlet Quantity | One |
| Installation Depth | 7.00–20.00 in. |
| Quantity | Sold as a Kit |
| EFI Support | Approx. 1,000 HP on pump or race gas |
| EFI E85 Support | Approx. 800 HP |
| Carbureted Support | Approx. 1,050 HP on pump or race gas |
| Carbureted E85 Support | Approx. 850 HP |
| Fuel System Requirement | Return-style regulator required |
| Recommended EFI Regulators | BPP13101BK, BPP13109BK |
| Recommended Carbureted Regulator | BPP13206BK |
| Fitting Design | Swivel banjo-style AN fittings |
| Intended Applications | High-horsepower EFI and carbureted engines |
| Tank Compatibility | Existing fuel tanks |
| Retrofit Application | EFI conversion / engine swaps |
| Safety Warning | Cancer and Reproductive Harm – Proposition 65 warning applies |
Ordering and Support Information
Before ordering the EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style, verify that the existing fuel tank provides between 7.00 and 20.00 inches of installation depth.
The fuel system must also accommodate the specified 8AN outlet and 6AN return connections.
A compatible return-style regulator is required. The supplied product information identifies BPP13101BK and BPP13109BK for EFI applications and BPP13206BK for carbureted applications.
Buyers should also consider the engine’s fuel requirements, fuel type, operating pressure, fuel-line capacity, electrical supply, and complete system configuration when determining whether the pump is appropriate for the application.
The supplied product information includes a California Proposition 65 warning concerning cancer and reproductive harm.
Frequently Asked Questions
What is the flow rate of this 450 LPH fuel pump?
The EFI In-Tank Retrofit Fuel Pump – 450 LPH – Return Style has a stated free-flow rate of 450 LPH, or approximately 119 GPH. It is designed for high-flow fuel systems supporting high-horsepower EFI and carbureted engine applications.
What size fuel tank can this retrofit pump fit?
The module is designed for fuel tanks with an installation depth between 7.00 and 20.00 inches. This range allows it to be installed into many existing fuel tanks without requiring a dedicated EFI conversion tank.
How much horsepower can the 450 LPH pump support?
The supplied figures indicate approximately 1,000 HP for EFI applications on pump or race gas, 800 HP on E85, approximately 1,050 HP for carbureted applications on pump or race gas, and 850 HP on E85. Actual capacity depends on the complete fuel system.
Does this fuel pump work with carbureted engines?
Yes. The supplied information identifies support for both EFI and carbureted applications. A compatible return-style regulator must be used, with BPP13206BK identified for carbureted applications.
What fuel-line connections does the pump use?
The pump uses an 8AN flare outlet and a 6AN flare return connection. The connections use male-thread attachments, while the swivel banjo-style design helps reduce protrusion from the fuel tank.
Does this retrofit pump require a return-style regulator?
Yes. The supplied product information specifically states that the pump must be used with a return-style regulator. BPP13101BK and BPP13109BK are identified for EFI applications, while BPP13206BK is identified for carbureted applications.
Can this pump be used for an engine swap?
Yes. The module is specifically designed for engine swaps and fuel-system upgrades where an existing fuel tank needs to support a higher-output EFI or carbureted engine. It can be particularly useful for muscle car and truck applications being converted to modern high-performance engines.
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