Fuel Pumps

About

Nothing kills a fast build like a fuel pump that can't keep up. If your engine bogs under boost, hesitates at wide-open throttle, or the fuel pressure gauge dips exactly when you need every drop of fuel, the stock pump is usually the bottleneck, not the tune. Evil Energy's electric fuel pump lineup is built around one job: deliver consistent, high-volume fuel supply for EFI systems , OEM-style replacements, and full custom builds, so the rest of your fuel system can actually do its job. Why a Stock Fuel Pump Can't Keep Up Most factory pumps are sized for factory horsepower. Add boost, bigger injectors, E85, or a compression bump, and the stock in-tank unit is often working past its design limit, which shows up as unstable fuel pressure at high RPM, hesitation under load, or a lean condition no tune can fix. This is the most common reason builders search for a high flow fuel pump : the stock pump can't physically flow enough fuel for the horsepower the engine is now making. Our external fuel pump and in-tank options range from 110LPH up to 405LPH, giving you the headroom to match the pump to the power level you're actually running instead of the one the factory designed around. For a closer look at how flow limits translate into real horsepower loss, see our 300LPH fuel pump upgrade guide . How to Choose the Right Fuel Pump for Your Build Not every build needs the same pump. The table below is a quick starting point before you look at individual listings; exact flow and voltage specs are always on the product page itself. Pump Type Best For Flow Range on This Page External / inline fuel pump Swaps where the tank stays stock; easiest access for future service 255–405 LPH In-tank fuel pump OEM-style stock or mild-performance replacement; factory-style mounting 110–255 LPH High flow fuel pump (300LPH+) Forced induction, E85, larger injectors, higher compression 300–405 LPH EFI pump kit LS swaps and custom EFI builds needing pump, fittings, and bracket in one box 110–300