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Air and Fuel› Fuel Pumps, Regulators and Components

Evil Energy

Adjustable Fuel Pressure Regulator

Name: Adjustable Fuel Pressure Regulator
Brand: Evil Energy
SKU: EVFS11309-AMZ1

$75.99

SKU: EVFS11309-AMZ1

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$100 Minimum Order

Non-Returnable Item

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Overview

The Evil Energy EFI Bypass Return Adjustable Fuel Pressure Regulator is a component for most Electronic Fuel Injection (EFI) systems. It is constructed from 6061-T6 aluminum alloy and is compatible with gasoline, E85, and alcohol/ethanol fuels. The regulator features adjustable pressure ranges and a bypass return design to prevent pressure spikes. The product comes in black or red and includes necessary fittings and hardware for installation.

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Constructed from precision-machined, corrosion-resistant 6061-T6 aluminum alloy, this regulator is built to withstand harsh engine bay conditions and offers long-term reliability. It is compatible with gasoline, E85, and alcohol/ethanol fuels. This regulator features a bypass return design, which effectively prevents pressure spikes during acceleration, boost, or high-load scenarios, thereby protecting sensitive fuel injectors and rails from potential damage. It is available in multiple adjustable pressure ranges, including 30-70 PSI, 20-75 & 75-120 PSI, and 30-80 & 80-140 PSI, with main fitting sizes of 6AN or 10AN depending on the chosen range. Each variant is offered as an all-in-one kit, typically including the fuel pressure regulator, a pressure gauge, necessary fittings, sealant tape, and tools like Allen keys for installation. Important compatibility notes: This regulator is not compatible with diesel fuel. Additionally, while compatible with E85 fuel, CPE fuel lines are not suitable for E85; PTFE-lined hoses must be used for E85 applications. For the 30-70 PSI variant, the included 6AN to M12x1.25 / M14x1.5 fittings are specifically for fuel rail use and should not be installed on the regulator itself, as this can cause leaks. Always use thread sealant tape on NPT gauge ports to prevent leaks.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Evil Energy
Part Number	EVFS11309-AMZ1
Category	Air and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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