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Headers vs. Manifold: Which is Best for Performance?

09 December 2025

Ready to Wake Up Your 1997-2003 Gen III 5.7L Engine? The Ultimate Guide to LS1 Heads

04 December 2025

How an Oil Catch Can Works: The Ultimate Guide to Engine Protection

03 December 2025

The Ultimate 650 CFM Carburetor Guide: Choosing the Best Model for Your Engine

27 November 2025

500 CFM vs 650 CFM: Choosing Between Cruising Economy and Street Performance

24 November 2025

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  • 20-75PSI&75-120PSI fuel pressure regulator
  • 300LPH high flow fuel pump
  • 6AN 20FT CPE/PTFE Durable fuel lines (optional fittings)
  • 10&100-micron fuel filter
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  • 60mm Fuel Filter Mounting Bracket*1
  • necessary fittings for easy installation. 
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[30-70PSI][30-70PSI,Black]
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red - Red

Durable Construction: Precision-machined 6061-T6 aluminum alloy, corrosion-resistant and heat-tolerant (withstands harsh engine bay conditions), ensuring long-term reliability.

EFI System Compatibility: Fits most vehicles' electronic fuel injection (EFI) systems; maintains stable fuel pressure for optimized combustion, performance, and fuel economy.

Fuel Compatibility: Works with gasoline, E85, and alcohol/ethanol; not compatible with diesel fuel; note: nylon braided fuel lines are not E85-compatible (use PTFE-lined hoses for E85).

Bypass Return Design: Prevents pressure spikes during acceleration, boost, or high-load scenarios, protecting fuel injectors and rails from damage.

All-in-One Kit: Each variant includes essential components (fuel pressure regulator, pressure gauge, fittings, sealant tape, tools like Allen keys); no extra purchases needed for standard installation.

Easy Installation & Tuning: Adjust pressure via top set screw (clockwise = increase, counterclockwise = decrease); use thread sealant tape on NPT gauge port to avoid leaks; professional installation highly recommended (especially for high-pressure variants).

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Headers-vs.-Manifold-Which-is-Best-for-Performance EVILENERGY

Headers vs. Manifold: Which is Best for Performance?

Amber 0 Comments

This article explains the differences between an exhaust manifold and performance headers, helping drivers choose the best option for maintenance or power upgrades. Stock exhaust manifolds are typically made from heavy cast iron, offering durability, heat retention, and quiet operation—but their log-style design creates backpressure that limits engine performance. Performance car headers, on the...
How-an-Oil-Catch-Can-Works-The-Ultimate-Guide-to-Engine-Protection EVILENERGY

How an Oil Catch Can Works: The Ultimate Guide to Engine Protection

Amber 0 Comments

For owners of modern vehicles, particularly those with Direct Injection (GDI) engines, understanding how an oil catch can works is essential for long-term reliability and preventing horsepower-robbing carbon buildup. This comprehensive guide demystifies this crucial engine protection device. We break down the core mechanism, visualizing a standard oil catch can diagram to explain step-by-step...
Close-up of a polished 650 CFM carburetor for V8 engines, featuring the title 'The Ultimate 650 CFM Carburetor Guide'.

The Ultimate 650 CFM Carburetor Guide: Choosing the Best Model for Your Engine

Amber 0 Comments

Why is 650 CFM the 'Golden Size'? Hey, friend! Welcome to EVIL ENERGY's experience-sharing post. If you're modifying your V8, you're no stranger to the term 650 CFM Carburetor. Why is it so popular? Because for most street performance cars, a 650 CFM setup is just right—it finds that perfect balance between 'maximum horsepower'...
500-CFM-vs-650-CFM-Choosing-Between-Cruising-Economy-and-Street-Performance EVILENERGY

500 CFM vs 650 CFM: Choosing Between Cruising Economy and Street Performance

Amber 0 Comments

Is bigger always better? When it comes to carburetors, the answer is often no. While 650 CFM units dominate the performance conversation, a 500 CFM carburetor is frequently the superior choice for small V8 engines (like the 283, 302, and 305) and daily drivers. This guide explores the 'Sweet Spot' of carburetor sizing, comparing...
This image promotes a guide on tuning or upgrading to the EVIL ENERGY 600 CFM carburetor to eliminate cold start problems in C/K Truck V8 engines.

How to Tune Your C/K Truck's Carburetor to Eliminate Cold Start Problems

Amber 0 Comments

This article addresses the common frustrations faced by classic C/K truck V8 engine owners, specifically hard cold starts and fuel leaks often caused by an outdated 4-barrel carburetor, highlighting the critical need for a reliable 600 CFM alternative. It introduces the EVIL ENERGY 600 CFM Carburetor as the definitive solution, boasting a 600 CFM...
EVIL-ENERGY-Black-Friday-Is-Live-Get-Ready-for-the-BIGGEST-Black-Friday-Deal-Ever EVILENERGY

EVIL ENERGY Black Friday Is Live! Get Ready for the BIGGEST Black Friday Deal Ever!

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EVIL ENERGY Black Friday IS LIVE! Guaranteed BIGGEST Black Friday Deal of the year. Throughout this month, catch random drops of MASSIVE DISCOUNTS, Flash Sales (like the $9.99 Wrench!), and secure your savings with Mystery Boxes (BEST VALUE $99.99 Deluxe Box) and automatic tiered discounts (up to $35 off). Follow now—miss it, wait until...

Latest Posts

Headers vs. Manifold: Which is Best for Performance?

Headers vs. Manifold: Which is Best for Performance?

Dec 09, 2025
This article explains the differences between an exhaust manifold and performance headers, helping drivers choose the best option for maintenance or power upgrades. Stock exhaust...
View details
Ready to Wake Up Your 1997-2003 Gen III 5.7L Engine? The Ultimate Guide to LS1 Heads

Ready to Wake Up Your 1997-2003 Gen III 5.7L Engine? The Ultimate Guide to LS1 Heads

Dec 04, 2025
Are you looking to restore or upgrade your classic Corvette or Camaro? If you are dealing with a tired engine or cracked castings, finding the...
View details
How an Oil Catch Can Works: The Ultimate Guide to Engine Protection

How an Oil Catch Can Works: The Ultimate Guide to Engine Protection

Dec 03, 2025
For owners of modern vehicles, particularly those with Direct Injection (GDI) engines, understanding how an oil catch can works is essential for long-term reliability and...
View details
The Ultimate 650 CFM Carburetor Guide: Choosing the Best Model for Your Engine

The Ultimate 650 CFM Carburetor Guide: Choosing the Best Model for Your Engine

Nov 27, 2025
Why is 650 CFM the 'Golden Size'? Hey, friend! Welcome to EVIL ENERGY's experience-sharing post. If you're modifying your V8, you're no stranger to the...
View details
500 CFM vs 650 CFM: Choosing Between Cruising Economy and Street Performance

500 CFM vs 650 CFM: Choosing Between Cruising Economy and Street Performance

Nov 24, 2025
Is bigger always better? When it comes to carburetors, the answer is often no. While 650 CFM units dominate the performance conversation, a 500 CFM...
View details
How to Tune Your C/K Truck's Carburetor to Eliminate Cold Start Problems

How to Tune Your C/K Truck's Carburetor to Eliminate Cold Start Problems

Nov 21, 2025
This article addresses the common frustrations faced by classic C/K truck V8 engine owners, specifically hard cold starts and fuel leaks often caused by an...
View details