Best Performance Fuel System Fittings of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 2, 2025

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Performance Fuel System Fittings are a crucial component for any high-performance engine. These fittings are designed to provide a precise and secure connection between the fuel lines and the fuel system components. They are made from high-quality materials that are resistant to corrosion and can withstand the high pressures and temperatures that are often encountered in high-performance applications. Performance Fuel System Fittings come in a variety of sizes and styles to accommodate different fuel systems and can be used for a range of applications, from street cars to race cars. With their superior quality and reliability, these fittings are a must-have for any serious engine builder or tuner.

At a Glance: Our Top Picks

Moroso Brass Fittings for Fuel Pumps and Regulators Cover #TOP 1
Moroso Brass Fittings for Fuel Pumps and Regulators
ftb score rating icon 9.8
Earl's Ano-Tuff Fuel Pressure Adapter Cover #TOP 2
Earl's Ano-Tuff Fuel Pressure Adapter
ftb score rating icon 9.7
Allstar Performance Auto Part Cover #TOP 3
Allstar Performance Auto Part
ftb score rating icon 9.5

Top 10 Performance Fuel System Fittings

#TOP 1

Moroso Brass Fittings for Fuel Pumps and Regulators

65380
Silver
Pack of 1
Moroso Brass Fittings for Fuel Pumps and Regulators Cover
Moroso- 65380 FITTING,FUEL HOSE

The Moroso- 65380 FITTING, FUEL HOSE are brass fittings that can be used on electric fuel pumps and regulators. They are vehicle specific and come in a package with dimensions of 11.938 H x 2.54 L x 7.874 W (centimetres). The fittings are made in China and belong to the Fuel System Fittings category.

What We Like
Handy brass fittings for fuel pumps and regulators
Vehicle specific fit
Compact and easy to store package
#TOP 2

Earl's Ano-Tuff Fuel Pressure Adapter

Earl's
AT100199ERL
No Color
No Size
Earl's Ano-Tuff Fuel Pressure Adapter Cover
Earls AT100199ERL Ano-Tuff Fuel Pressure Gage Adapter

The Earl's Ano-Tuff Adapter is designed with an exclusive hard-anodized coating that not only enhances its durability but also ensures resistance against wear and corrosion. This means you can trust the adapter to last longer than traditional fittings, providing you with reliable performance over time. Its aggressive look adds a stylish touch to your engine, making it a great choice for those looking to upgrade their setup. Additionally, the adapter features a convenient male to female connection, making it easy for you to install gauges with a 1/8 inch NPT fitting.

What We Like
Durable hard-anodized coating
Corrosion and wear resistance
Aggressive engine appearance
Easy installation
#TOP 3

Allstar Performance Auto Part

Allstar Performance
ALL50019
Silver
4AN to 1/8"
Allstar Performance Auto Part Cover
Allstar Performance ALL50019 4 AN Male to 1/8 in NPT Male 90° Adapter, 4AN to 1/8"

This Allstar Performance Auto Part is a 4 AN male to 1/8 in NPT male 90° adapter designed for automotive fuel system fittings. It has a compact size of 4.5" L X 3.5" W X 0.5" H and is made in China. The product offers vehicle-specific fit type, ensuring compatibility with your car's fuel system.

What We Like
Compact size
Vehicle-specific fit type
Designed for automotive fuel system fittings
#TOP 4

Edelbrock 640223 Holley Fitting

640223
Black
Edelbrock 640223 Holley Fitting Cover
Edelbrock 640223 Male #6 To 7/8"-20 Thread Single Feed Holley Fitting Black

The Edelbrock Holley Fitting is designed by a team of automotive enthusiasts who understand the intricacies of performance parts. Their expertise ensures that each fitting is crafted with care and precision, enhancing your vehicle's fuel system. By conducting real-world tests, they guarantee that every product meets high standards of quality and reliability. Edelbrock also emphasizes American manufacturing, providing you with confidence in the durability of their components. This fitting is vehicle specific, ensuring a perfect match for your setup and making installation straightforward and efficient.

What We Like
High-quality American manufacturing
Real-world testing for reliability
Designed by automotive enthusiasts
Vehicle-specific fit
#TOP 5

Edelbrock - Russell 640220 -6 AN Red Carburetor Adapter Fitting

RUS-640220
1 Count (Pack of 1)
Edelbrock - Russell 640220 -6 AN Red Carburetor Adapter Fitting Cover
Edelbrock - RUS-640220 / Russell 640220 -6 AN Red Carburetor Adapter Fitting

Edelbrock's Russell 640220 -6 AN Red Carburetor Adapter Fitting is made of aluminum and vehicle specific. The product is designed and tested by experienced automotive enthusiasts who understand the workings of engines and EFI systems. Their passion for performance has directly influenced every product they design and sell. The manufacturing facilities are located in the US and have earned the ISO 9001: 2008 registration for quality.

What We Like
Designed and tested by experienced automotive enthusiasts who understand the workings of engines and EFI systems.
The manufacturing facilities are located in the US and have earned the ISO 9001: 2008 registration for quality.
Vehicle specific.
#TOP 6

RUSSELL 624163 Twist-Lok Hose End

RUSSELL
624163
Black
RUSSELL 624163 Twist-Lok Hose End Cover
RUSSELL/EDEL Russell 624163 Twist-Lok Black 6-AN 90° Straight Hose End

The RUSSELL Twist-Lok Hose End is an essential component for your fuel system fittings. Made in the United States, this product ensures high-quality performance. It comes packaged as a single unit, making it convenient for your specific needs. With dimensions of approximately 11.938 cm in length, 6.604 cm in width, and 4.572 cm in height, it’s compact enough for various applications. This hose end is designed to help you achieve secure connections, providing peace of mind during use. You can trust it to deliver reliability and efficiency in your automotive projects.

What We Like
High-quality American craftsmanship
Compact and convenient size
Single unit packaging
Reliable fuel system fitting
#TOP 7

Allstar Performance Red Fitting Caps

Allstar Performance
ALL50807
16AN
Allstar Performance Red Fitting Caps Cover
Allstar Performance ALL50807 Red Plastic Fitting Cap for -16AN and 1-5/16-12 Thread, (Pack of 10)

The Allstar Red Caps are designed to fit -16AN and 1-5/16-12 threaded ports, offering a reliable solution for protecting your lines and hoses from debris. Made from durable red plastic, these caps help keep the internal parts of dry sump pumps, fuel pumps, and pressure regulators clean during storage. They are compatible with 37-degree flared fittings, ensuring a secure fit. Sold in a convenient pack of ten, these caps provide an easy way to maintain the cleanliness and integrity of your performance fuel system components.

What We Like
Durable plastic construction
Prevents debris contamination
Fits multiple fitting types
Pack of ten for convenience
#TOP 8

RUSSELL 660350 Aluminum Flare Union Adapter

RUSSELL
660350
Blue
1 Count (Pack of 1)
RUSSELL 660350 Aluminum Flare Union Adapter Cover
RUSSELL/EDEL 660350 Blue Anodized Aluminum -6AN Flare Union Adapter

The RUSSELL Flare Union Adapter is designed to work seamlessly with all Russell performance hoses and hose ends. Its anodized finish not only enhances durability but also adds a sleek look to your setup. Made from high-quality 303 stainless steel, this adapter is precision machined, ensuring that you achieve a secure thread engagement and a tight seal. With options for standard, metric, and pipe threads, it easily connects to a variety of components like oil pumps and fuel filters, making it a versatile choice for your fuel system needs.

What We Like
Durable anodized finish
Precision machined for tight seal
Compatible with various components
Multiple thread options available
#TOP 9

Allstar Performance 3 AN Bulkhead Fitting

Allstar Performance
ALL50104
Black
Allstar Performance 3 AN Bulkhead Fitting Cover
Allstar Performance ALL50104 3 AN to 3/8-24 Black Aluminum Bulkhead Fitting Adapter

The Allstar 3 AN Fitting is designed to enhance your fuel system with its lightweight and durable construction. Weighing only 0.025 kilograms, this fitting is easy to handle and install. Its black anodized finish not only provides a sleek look but also offers corrosion resistance, ensuring longevity. With dimensions of 1.9 x 11.4 x 8.7 centimeters, it fits seamlessly into your vehicle's specific requirements, making installations straightforward and efficient. This bulkhead fitting is ideal for those looking to improve their fuel system's performance while enjoying the benefits of a quality product.

What We Like
Lightweight design
Corrosion-resistant finish
Vehicle-specific fit
Sleek appearance
#TOP 10

Earl's Ano-Tuff Adapter AT165006ERL

Earl's
AT165006ERL
Black
Earl's Ano-Tuff Adapter AT165006ERL Cover
Earls AT165006ERL Ano-Tuff Special Purpose Adapter

The Earl's Ano-Tuff Adapter is designed with an exclusive hard-anodized coating that enhances durability and wear resistance, making it a reliable choice for your fuel system fittings. This coating not only protects against corrosion but also penetrates the aluminum, ensuring that it lasts twice as long as traditional anodized fittings. Additionally, its aggressive look adds a stylish touch to your engine, elevating its overall appearance. With a size of 3/8 inch and a -06AN male fitting, this adapter is a practical solution for those looking to improve their engine’s performance and aesthetics.

What We Like
Durable hard-anodized coating
Corrosion and wear resistance
Aggressive engine appearance
Twice the lifespan of traditional fittings
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Is it OK to use rubber fuel lines?

Rubber fuel lines should not be used to plumb an entire fuel system. While easy to install, rubber hoses start degrading as soon as fuel hits them, making them less durable and potentially unsafe for the fuel system.

2. Is braided fuel line better than rubber?

Braided fuel lines are generally better than rubber lines in terms of durability and performance. They are stiffer, more durable, and provide better heat dissipation and flow. It is important to add proper hose ends to the tubing or purchase braided hose specifically designed for the application when using braided fuel lines.

3. Which is better Teflon or rubber fuel line?

Teflon (PTFE) fuel lines have advantages over rubber fuel lines in terms of chemical resistance and longevity. While they may be less flexible than rubber, PTFE hoses are highly resistant to chemicals and release fewer fumes. They are a good choice for enclosed spaces and have a slower breakdown rate compared to rubber hoses.

4. Which is better metal or rubber fuel lines?

Metal fuel lines are generally more durable than rubber or braided fuel lines. They are resistant to wear and tear, do not crack or deteriorate easily, and have a longer lifespan. Rubber fuel lines can become hard and brittle over time, while braided fuel lines may be prone to leaks if the braid gets damaged.

5. What size fuel line for 1000 hp?

For a 1000 horsepower gasoline or race gas powered engine, an 8AN feed line and 6AN return line at 30psi is usually sufficient. However, for an E85 fuel setup, it is recommended to use a 10AN feed line and 8AN return line, considering the higher fuel demand.

6. Is metal fuel line better than rubber?

Metal fuel lines are generally considered better than rubber lines. Most cars come from the factory with metal lines because they offer greater durability and resistance to wear and tear compared to soft materials like rubber. Metal fuel lines are commonly made from stainless steel, aluminum, or coated steel tube, making them a reliable choice for fuel systems.

Editor's Notes

During our performance fuel system fitting research, we found 24 performance fuel system fitting products and shortlisted 10 quality products. We collected and analyzed 5,419 customer reviews through our big data system to write the performance fuel system fittings list. We found that most customers choose performance fuel system fittings with an average price of $17.04.

The performance fuel system fittings are available for purchase. We have researched hundreds of brands and picked the top brands of performance fuel system fittings, including Moroso, Earl's, Allstar Performance, Edelbrock, RUSSELL. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.