Find the right 340 LPH fuel pump for your high-performance or street-performance build. This guide highlights five top options, explains who they’re best for, and helps you compare output, compatibility, and installation considerations. Ideal buyers include racers seeking reliable high-flow EFI support, daily drivers upgrading to boosted power, and enthusiasts replacing worn pumps in tuned engines. A quick summary table of the five selected products follows the intro for fast reference.
Product Comparison Table
| Product | Brand | Key Strength | Best For |
|---|---|---|---|
| Aeromotive 340 LPH In-Tank Fuel Pump – 12V | Aeromotive | High-flow over 340 LPH at 40 PSI | Naturally aspirated to turbocharged setups |
| AEM 50-1215 340LPH | AEM | Includes harness, pre-filter, O-rings | Plug-and-play EFI systems, E85 capable |
| Aeromotive 340 LPH In-Tank Fuel Pump – 11540 | Aeromotive | Compact 39mm design, OEM-style | OEM hanger assemblies compatibility |
| KEMSO 340LPH High Performance | KEMSO | Replaces Walbro 255LPH with 340 LPH | High-BHP NA or boosted builds |
| AEM 50-1000 High Flow In-Tank | AEM | Tested to 340 LPH at 40 PSI, wide voltage range | High-output EFI, flexible voltage |
Aeromotive 340 LPH In-Tank Fuel Pump – 12V Electric High-Flow EFI – 11542
Best for high-output EFI systems requiring strong, consistent fuel delivery. The 340 LPH capability at 40 PSI suits naturally aspirated to turbocharged engines, with a compact 39mm body designed for select in-tank hanger assemblies. This pump supports high-output engines across a broad pressure range, making it a versatile choice for performance upgrades. Best for buyers who want a dedicated high-flow in-tank solution with OEM-like fitment. Caution: verify vehicle compatibility in the Aeromotive application catalog to ensure hanger compatibility.
AEM 50-1215 340LPH High Flow In-Tank Fuel Pump, E85 Compatible
Best for complete in-tank kits with wiring, pre-filter, and O-rings. The AEM 50-1215 is engineered to flow 340 LPH at 40 PSI and is compatible with ethanol fuels up to E100 and methanol up to M100, as well as regular gasoline. It’s ideal for enthusiasts who want an integrated package that reduces additional parts sourcing. Choose this if you prefer a ready-to-install kit and fuel compatibility with ethanol blends. Limitation: gasoline-only operation is specified for some kits; verify your fuel type before switching to E85 or methanol.
Aeromotive 340 LPH In-Tank Fuel Pump – 12V High-Flow EFI – 11540
Best for buyers needing a compact, OEM-style pump with robust high-flow output. The 39mm pump body aligns with select in-tank hanger assemblies, and it is designed to deliver sustained fuel volume for naturally aspirated and boosted engines across a broad pressure range. Choose this when OEM-fitment is a priority and you have a compatible hanger. Caution: service compatibility with your vehicle’s hanger catalog is essential to avoid fitment issues.
KEMSO 340LPH High Performance Fuel Pump
Best for high-BHP builds that require a reliable 340 LPH replacement with strong support. The Kemso pump is marketed to support up to 600 BHP in naturally aspirated, turbocharged, and supercharged setups. It’s a solid choice for enthusiasts replacing older Walbro units and seeking consistent fuel delivery with US-based support. Limitation: verify compatibility with your car’s fuel system and mounting standards; some vehicles may require adapter hardware.
AEM 50-1000 High Flow In-Tank Fuel Pump
Best for flexible voltage operation and broad EFI applications. This AEM pump is designed for high-output naturally aspirated and forced-induction systems and is tested to flow 340 LPH at 40 PSI. It features a 39mm diameter and an offset inlet to ease installation. It includes a pre-filter, end caps, and a harness. Choose this if you need a robust, voltage-flexible unit with a complete install kit. Caution: operation efficiency can vary with E85 fuel—confirm fuel type compatibility for your build.
Buying Guide: Key Considerations for 340 LPH Fuel Pumps
- Fuel compatibility: Confirm whether your project uses gasoline, E85, or other alcohol fuels, and ensure the pump supports that fuel type and ethanol blends.
- Flow vs. pressure: Most pumps are rated at 340 LPH at 40 PSI. Check your fuel system’s required flow at your target pressure to avoid fuel starvation or excessive pressure drops.
- Fitment and mounting: OEM-style 39mm bodies fit select in-tank hangers. Verify hanger compatibility and mounting depth for a clean installation.
- Completeness of kits: Some options include wiring harnesses, pre-filters, O-rings, and clamps, which simplify install and reduce part hunting.
- Voltage range and durability: Pumps like AEM 50-1000 tolerate a wide voltage range (6–18V). Consider your electrical system’s stability and any planned upgrades.
- Intended vehicle use: For daily drivers, prioritize reliability and ease of maintenance. For race cars, emphasize maximum consistent flow under high-demand conditions.
- Replacement vs. upgrade: If replacing an aging pump, match the new unit to the previous flow rate to maintain similar performance unless you plan a broader system upgrade.
Frequently Asked Questions
- What does 340 LPH mean for a fuel pump?
It refers to the pump’s flow rate, liters per hour, at a specified pressure (commonly 40 PSI) and indicates high-flow capability suitable for performance engines. - Are 340 LPH pumps compatible with E85?
Some models are E85 compatible, notably certain AEM units; always verify the exact model’s ethanol tolerance before use. - Do I need a complete kit or can I buy a pump alone?
Many options include wiring harnesses and filters, which simplifies installation. If you already have accessories, a pump-only option may suffice. - Which pump is best for a turbocharged build?
Pumps delivering steady high flow across a wide pressure range are ideal; Aeromotive and AEM models in this list are commonly chosen for boosted engines. - What should I check before buying a replacement pump?
Check fuel type, mounting compatibility, hose and line fittings, and whether your vehicle’s hanger is compatible with the pump’s body size. - Is a higher flow always better?
Not necessarily. Excess flow can cause pressure issues or wasted energy if not matched to the engine’s fuel demand and the system’s pressure regulator.