Specifications Description Shipping & Return Videos & Blogs Reviews
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
Fuel pressure regulator installation methods
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
[30-70PSI]
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
[30-80PSI&80-140PSI]
[30-80PSI&80-140PSI]
[30-70PSI]
Fuel pressure regulator installed in various EFI engine bay setups, demonstrating compatibility with different vehicles.

EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red

SKU: EVKT01568BA-AMZ1
Product Type: Fuel Pressure Regulators
$75.99
$75.99
$119.99
Adjustment range: 30-70PSI

[Application] Bypass fuel pressure regulator designed for EFI systems in performance vehicles, custom engine builds, and racing applications. Compatible with LS swaps and turbo setups.
[Medium]
- Fuel compatibility: Gasoline, E85 ethanol blends, and alcohol/methanol fuels
- Incompatible with: Diesel fuel
- Warning: Nylon braided fuel lines are not compatible with E85 fuels
[Adjustable Range]
- Pressure ranges: 20-120 PSI / 30-70 PSI / 30-140 PSI (model-specific)
- Adjustment method: Turn set screw on regulator top
- Fitting specifications: 6AN/10AN inlet/outlet with 6AN/10AN bypass return port
[Installation Notes]
1. NPT gauge port installation: Must use thread sealant tape
2. Professional installation recommended
3. Direct bolt-on design with included hardware

Secure online checkout with free 1-year warranty, 180-day money-back guarantee, free shipping over $50, and expert customer support from EVIL ENERGY.
[30-70PSI]

EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red

$75.99 $119.99
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
Fuel pressure regulator installation methods
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
[30-70PSI]
[30-70PSI]
[20-75PSI&75-120PSI]
[30-80PSI&80-140PSI]
[30-80PSI&80-140PSI]
[30-80PSI&80-140PSI]
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red
[30-70PSI]
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red
Fuel pressure regulator installed in various EFI engine bay setups, demonstrating compatibility with different vehicles.
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red

EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red

$75.99 $119.99
Adjustment range: 30-70PSI
Specifications

Brand EVIL ENERGY
Product Type EFI Bypass Return Adjustable Fuel Pressure Regulator
Compatible Systems Most vehicles' Electronic Fuel Injection (EFI) systems
Fuel Compatibility Gasoline, E85, alcohol/ethanol
Not compatible with diesel fuel; Nylon braided fuel lines not compatible with E85
Pressure Adjustment Range 30-70PSI/20-75&75-120PSI/30-80&80-140PSI
Main Fitting Size 30-70PSI/20-75&75-120PSI:6AN
30-80&80-140PSI:10AN
Instrument/Vacuum Port 30-70PSI/20-75&75-120PSI: 1/8 inch NPT (gauge port only)
30-80&80-140PSI:1/8 inch NPT (gauge port + vacuum interface)
Material 6061-T6 aluminum alloy (precision-machined, corrosion-resistant)
Installation Note 1. Use thread sealant tape for NPT gauge port to prevent leaks
2. Professional installation highly recommended
30-70PSI only: 6AN to M12x1.25 / M14x1.5 fittings for fuel rail use ONLY (installing on regulator causes leaks)
Package Include 30-70PSI:
1×Fuel pressure regulator
1×Pressure gauge
1×Bracket
2×AN6 port plug
4×6AN to 6AN ORB fitting
1×6AN ORB to 6AN Barb fitting
1×6AN to M12×1.25 fitting
1×6AN to M14×1.5 fitting
3×6AN Stainless Steel Braided CPE Fuel Line

20-75&75-120PSI:
1×Fuel pressure regulator
1×Pressure gauge
1×Replacement spring
1×AN10 port plug
1×Allen key
1×Sealant tape
1×6AN to 6AN ORB fitting
2×6AN to AN10 ORB fittings
2×AN8 to AN10 ORB fittings
2×AN10 to AN10 ORB fittings

30-80&80-140PSI:
1×Fuel pressure regulator
1×Pressure gauge
1×Replacement spring
1×AN10 ORB port plug
1×Allen key
1×Sealant tape
3×AN10 ORB to AN6 fitting
3×AN10 ORB to AN8 fitting
3×AN10 ORB to AN10 fitting

30-70PSI:fuel pressure regulator
20-75&75-120PSI:Package Includes
30-80&80-140PSI:fuel pressure regulator

Description

The EVIL ENERGY EFI Bypass Fuel Pressure Regulator is a precision-engineered component designed to maintain stable fuel pressure for EFI systems, ensuring optimal combustion efficiency, engine performance, and fuel economy. Crafted from high-strength 6061-T6 aluminum alloy, it withstands harsh engine bay conditions (heat, vibration, corrosion) and is compatible with common performance fuels (gasoline, E85, alcohol/ethanol) — making it ideal for daily drivers, modified vehicles, and high-performance builds.

30-70PSI: Daily-Driven EFI Systems
This fixed-range regulator (30-70PSI) is tailored for standard EFI vehicles, providing reliable pressure control without extra adjustments. It includes 3×6AN braided CPE fuel lines and fuel rail-specific fittings (6AN to M12x1.25 / M14x1.5), eliminating the need for separate part purchases. Perfect for commuters or mild modifications where consistent, moderate pressure is required.

20-75&75-120PSI: Flexible Tuning for Modified Builds
With two pressure ranges (via replaceable spring), this variant adapts to diverse needs: 20-75PSI for street-focused setups, 75-120PSI for more aggressive modifications (e.g., turbocharged daily drivers). It comes with multi-size ORB fittings (6AN/8AN/10AN) for custom routing and an Allen key for easy spring replacement — ideal for enthusiasts who upgrade their engine over time.

30-80&80-140PSI: High-Performance Racing & Turbo Setups
Built for high-horsepower EFI systems (e.g., drag racing, track cars), this 10AN regulator offers extended pressure range (30-140PSI via replaceable spring) and a dedicated vacuum interface for precise pressure matching under boost. It includes 9 multi-size ORB fittings (AN6/8/10 to 10AN) for complex fuel system routing, ensuring stable pressure even in extreme load conditions.

Key Reminders:
- Avoid diesel fuel and nylon braided lines with E85 (use PTFE-lined hoses for E85).
- Always use sealant tape on NPT ports to prevent fuel leaks.
- Variant 1's 6AN to M12x1.25/M14x1.5 fittings are not for regulator installation.


Why Choose EVIL ENERGY EFI Fuel Pressure Regulator?

1. Durable, Performance-Proven Build

  • 6061-T6 aluminum alloy resists corrosion and engine bay heat (up to 250°F), ensuring long-term reliability.
  • Bypass return design prevents pressure spikes during acceleration/boost, protecting injectors and fuel rails.

2. Tailored to Your Build's Needs

  • 3 variants cover all EFI scenarios: daily driving (30-70PSI), flexible modifications (20-75&75-120PSI), high-performance racing (30-140PSI).
  • Replaceable springs (Variant 2/3) let you upgrade pressure without buying a new regulator.

3. All-in-One Kit Saves Time & Money

  • Each variant includes all necessary parts (fittings, gauge, tape, tools) — no extra purchases for standard installation.
  • Multi-size fittings (especially Variant 2/3) adapt to existing fuel systems, reducing custom fabrication costs.

4. Safe & Easy to Install

  • Clear installation notes (e.g., NPT sealant tape, fitting usage) minimize mistakes.
  • Professional installation recommended for high-pressure variants (Variant 2/3) to ensure optimal tuning and safety.

FAQ About EFI Bypass Fuel Pressure Regulator

Q: Will this regulator fit my EFI vehicle?

A: It fits most EFI systems, but confirm your fuel line size (6AN for Variant 1/2, 10AN for Variant 3) and pressure requirements. For custom builds, Variant 2/3's multi-size fittings offer more flexibility.

Q: Can I use E85 with all variants?

A: Yes, but avoid nylon braided fuel lines — use PTFE-lined hoses for E85 compatibility. All regulators are E85-resistant, but lines must match.

Q: How do I adjust the pressure?

A: Turn the top set screw (clockwise = increase pressure; counterclockwise = decrease). For Variant 2/3, swap the spring first if you need to switch between pressure ranges (e.g., 20-75PSI → 75-120PSI).

Q: Why does Variant 1 have fuel rail-specific fittings?

A: The 6AN to M12x1.25/M14x1.5 fittings connect the regulator to common fuel rail ports — installing them on the regulator itself will cause leaks, so only use them for fuel rail connections.

Q: Do I need a vacuum line for Variant 3?

A: The 1/8 inch NPT vacuum interface is optional but recommended for turbocharged systems — it synchronizes fuel pressure with manifold vacuum, optimizing fuel delivery under boost.

Shipping & Return

Brand Summary

Policy Details
Cancellation Policy Orders can be canceled within 48 hours of placement. Refund processed in 3-5 business days.
Returns Policy Returns accepted within 180 days. Full refund within 90 days; 15% fee for 90-180 days.
Non-Returnable Items Only regular-priced items are eligible for refunds; sale items are non-refundable.
Refund Processing If no refund received, check your bank/credit card. For ongoing issues, contact support@ievilenergy.com.

Return Reasons

  1. Quality Issues: Provide photos/videos; we cover return shipping.
  2. Wrong Item Ordered: Buyer covers return shipping; email within 30 days.
  3. Change of Mind: Buyer covers return shipping; email within 30 days.
  4. Shipping Damage: Inspect packages; do not sign for damaged items.
  5. Incorrect Item Shipped: Contact within 7 days.

Price Protection Policy

Effective from August 25, 2024. Price drops within 7 days of purchase can be claimed.

Disclaimer

EVIL ENERGY reserves the right to interpret, modify, or terminate this policy in accordance with applicable laws and regulations.

If you need further information or assistance, feel free to ask!

Videos & Blogs

Product Videos

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Reviews

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Customer Reviews

Based on 8 reviews
63%
(5)
0%
(0)
0%
(0)
13%
(1)
25%
(2)
M
Mike F
Fuel PSI Regulator. EFI -

I purchased Evil fuel pressure regulator for an EFI set up, it comes with a nice gauge extra fittings. The packaging is really nice. The regulator itself as soon as you pick it up it’s very durable. It’s very well-made. I was very impressed. It works perfect perfectly. This is a high dollar regulator at an affordable price. I would definitely recommend this product.

E
Eugene OGorman
Fuel pressure regulator

I have not had a chance to install it yet. There were no instructions and an extra spring that I assume is for the high pressure. I need 100psi

J
Jeremy Howard
Items didn't show up

1 out of the 3 items showed up. Sent 2 emails asking with no response.

123

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