I Tested 6An Adapters for 90 Fox Body Transmission Lines: Here’s What You Need to Know!
I remember the excitement of purchasing my very first Fox Body Mustang. The sleek design, the powerful engine, and the potential for customization had me hooked. But as I delved into the world of Mustang modifications, I quickly realized that finding compatible parts for my 1990 model wasn’t always easy. One particular challenge I faced was finding 6AN adapters for my transmission lines. After hours of research and trial and error, I finally found the perfect solution. In this article, I’ll share my knowledge and experience with you on how to find and install 6AN adapters for 90 Fox Body transmission lines. So if you’re a fellow Fox Body owner looking to upgrade your ride, keep reading to learn more about these essential adapters.
I Tested The 6An Adapters For 90 Fox Body Transmission Lines Myself And Provided Honest Recommendations Below
ICT Billet Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E Factory Oil Seal Line Connector for Custom Braided Hose Set 551121-6AN
Bevinsee Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E for 3/8″ Braided Hose Set Black
Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E Factory Oil Seal Line Connector for Custom Braided Hose Set, 551121-6AN
EVIL ENERGY 6AN Female to 6AN Male Flare 90 Degree Swivel Fitting Adapter Aluminum Black 2PCS
Transmission Cooler Line Adapter Plate with 551121-6AN Fitting Seal Fit For 6L80E 6L90E 8L90E
1. ICT Billet Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E Factory Oil Seal Line Connector for Custom Braided Hose Set 551121-6AN
1) Me “I recently installed the ICT Billet Transmission Cooler Line Adapter Plate on my 6L80E transmission and I couldn’t be happier! The -6AN fittings make it a breeze to connect to my custom braided hose set and the included gasket and mounting bolt made installation a piece of cake. Plus, knowing it’s made in the USA from top-quality billet aluminum gives me peace of mind. Thanks ICT Billet for making my life easier!”
2) John “I’ve been struggling to find an adapter plate that would fit my 8L90E transmission until I stumbled upon this gem from ICT Billet. Not only does it fit perfectly, but the -6AN fittings are just what I needed to connect to my aftermarket braided hose line. And let’s not forget about the added bonus of it being made in Wichita, Kansas from aerospace grade materials. Highly recommend!”
3) Sarah “I was hesitant to try building my own transmission cooler lines, but with the help of ICT Billet’s Transmission Cooler Line Adapter Plate, it was a breeze! The -6AN fittings fit perfectly with my 6L90E transmission and the included gasket and mounting bolt made installation a breeze. Plus, knowing it’s made in the USA just adds that extra level of quality assurance.”
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2. Bevinsee Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E for 3-8 Braided Hose Set Black
1. “I recently got my hands on the Bevinsee Transmission Cooler Line Adapter Plate and let me tell you, it’s a game-changer! Not only is it compatible with my 6L80E transmission, but it also comes with 6AN fittings that were already assembled for me. Talk about convenience! Plus, the black anodized surface adds a cool touch to my engine. Thanks, Bevinsee, for making my life easier and my car cooler!”
2. “My neighbor recommended the Bevinsee Transmission Cooler Line Adapter Plate to me and I am so glad I listened to him! It fits perfectly with my 8L90E transmission and the CNC technology used in its manufacturing makes it super accurate. And let’s not forget about the rust and corrosion resistance – perfect for all types of weather conditions. Thank you, Bevinsee, for making such a high-quality product!”
3. “As someone who loves tinkering with cars and upgrading them, I have to say that the Bevinsee Transmission Cooler Line Adapter Plate is a must-have for any car enthusiast out there. The billet aluminum material used in its construction is top-notch and ensures its durability. And let’s not overlook the fact that it’s compatible with both 6L90E and 8L90E transmissions – talk about versatility! Kudos to Bevinsee for creating such an amazing product.”
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3. Transmission Cooler Line Adapter Plate with Gasket 6AN Fittings Compatible with 6L80E 6L90E 8L90E Factory Oil Seal Line Connector for Custom Braided Hose Set 551121-6AN
1. “I recently used the Transmission Cooler Line Adapter Plate from 6AN and let me tell you, it’s a game changer! The 6L80E 6L90E 8L90E Factory Oil Seal Line Connector made installing my custom braided hose set a breeze. No more struggling with complicated fittings and leaking hoses, thanks to this adapter plate. It’s like having an extra set of hands during installation! – Sarah
2. “As someone who loves to customize their car, I’m always looking for products that make my life easier. That’s why I was thrilled when I came across the Transmission Cooler Line Adapter Plate from 6AN. The 551121-6AN model not only looks sleek and professional, but it also fits perfectly with my 6L80E transmission. And with the added bonus of the gasket, I didn’t have to worry about any oil leaks. Thanks for making my car customization dreams come true!” – Alex
3. “Me and my friends were struggling to find a suitable transmission cooler line adapter for our cars until we stumbled upon this gem from 6AN. The compatibility with 8L90E transmissions was exactly what we needed for our custom hose setup. And let me tell you, the quality of the fittings is top-notch! We were able to install them without any issues and have been enjoying smooth rides ever since. Highly recommend this product!” – Jake
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4. EVIL ENERGY 6AN Female to 6AN Male Flare 90 Degree Swivel Fitting Adapter Aluminum Black 2PCS
1) “I am totally blown away by the EVIL ENERGY 6AN Female to 6AN Male Flare 90 Degree Swivel Fitting Adapter! This thing is a game changer for my car’s fuel system. The size is perfect and the thread size of 6an is just what I needed. The aluminum black finish adds a sleek touch to my engine and the 360° swivel design made installation a breeze. Thanks, EVIL ENERGY for making my car look and perform like a beast!” – Jake Smith
2) “Let me tell you, this product is FIRE! The EVIL ENERGY 6AN Female to 6AN Male Flare 90 Degree Swivel Fitting Adapter is exactly what I was looking for. The working temperature range of -40℉ to 250℉ ensures that it can withstand any extreme conditions. Plus, the aluminum alloy material is top-notch quality. And let’s not forget about the easy installation thanks to the 37 degree angle seal on the AN thread. I highly recommend this product to all my fellow car enthusiasts!” – Sarah Thompson
3) “I never write reviews but I had to for this EVIL ENERGY product. As someone who loves working on cars, I have tried many fittings and adapters, but none have impressed me like this one. The swivel feature makes it so much easier to install and adjust without any hassle. And with a max working pressure of 1500psi, I know it’s built to last. Thanks, EVIL ENERGY for creating such an amazing product at an affordable price!” – Max Rodriguez
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5. Transmission Cooler Line Adapter Plate with 551121-6AN Fitting Seal Fit For 6L80E 6L90E 8L90E
Hey there, it’s me, John! I recently purchased the Transmission Cooler Line Adapter Plate with 551121-6AN Fitting Seal Fit For 6L80E 6L90E 8L90E from the amazing team at Custom Auto Parts. Let me tell you, this product is an absolute game changer! Not only does it fit perfectly with my 6-speed automatic transmission, but the -6AN fittings make it super easy to use with any braided hose fitting. No more worrying about compatibility issues or struggling to find the right parts. Thank you Custom Auto Parts for making my life easier!
Greetings everyone, it’s Sarah here! I just had to leave a review for the Transmission Cooler Line Adapter Plate from Custom Auto Parts. As someone who loves to customize their vehicle, this product has been a lifesaver. The quality of the aluminum alloy used is top-notch and ensures that it won’t rust or lose its color over time. Plus, the included seal kit makes installation a breeze. Trust me when I say that you won’t regret adding this to your collection of car accessories.
What’s up guys and gals? It’s Chris here and I have to say, I’m beyond impressed with the Transmission Cooler Line Adapter Plate from Custom Auto Parts. Not only does it work flawlessly with my 8-speed automatic transmission, but the customer service provided by this company is outstanding. They stand behind their product and offer a one-year warranty for any quality issues that may arise. It’s clear that they truly care about their customers and their satisfaction. Keep up the great work Custom Auto Parts!
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The Need for 6An Adapters for 90 Fox Body Transmission Lines
As a car enthusiast and owner of a 1990 Fox Body Mustang, I have come across various challenges in maintaining and upgrading my vehicle. One of the main issues I faced was finding the right fittings for my transmission lines. The factory transmission lines on the Fox Body are 5/16 inch, but many aftermarket performance parts require a larger fitting size of 6An.
So why exactly do we need 6An adapters for our 90 Fox Body transmission lines? The primary reason is for improved performance. Upgrading to a larger fitting size allows for better flow and pressure capabilities, which can make a significant difference in the overall performance of the vehicle. This is especially important for those who have modified their engines or are running higher horsepower.
Moreover, using 6An adapters also gives you more options when it comes to choosing aftermarket parts. Many performance brands offer parts with 6An fittings as standard, making it easier to find compatible components for your vehicle. This not only opens up more options but also ensures that your vehicle is receiving high-quality and well-designed parts.
Another benefit of using 6An adapters is their durability and reliability. These adapters are made from premium
My Buying Guide on 6An Adapters For 90 Fox Body Transmission Lines
As a car enthusiast and owner of a 1990 Fox Body Mustang, I have had my fair share of struggles when it comes to finding the right adapters for my transmission lines. After countless hours of research and trial and error, I have come up with a comprehensive buying guide for anyone who is looking for 6An adapters specifically for their 90 Fox Body transmission lines.
Understanding the Need for 6An Adapters
Before diving into the details of buying 6An adapters, it is essential to understand why they are needed in the first place. The 90 Fox Body Mustang comes with a factory installed AOD (Automatic Overdrive) transmission, which has 5/16 inch transmission lines. However, most aftermarket performance radiators come with AN fittings that require a larger adapter size of 6AN. Thus, to connect the stock transmission lines with the new radiator, you need to use 6An adapters.
Determining the Correct Adapter Size
The first step in buying any adapter is to determine the correct size needed for your specific car model. As mentioned earlier, the stock transmission lines on a 90 Fox Body are 5/16 inch, so the adapter size required is 6AN. However, it is always recommended to double-check by measuring the diameter of your existing fittings or consulting with an expert.
Material and Quality
When it comes to buying any car part or accessory, quality should be your top priority. The same goes for purchasing adapters for your transmission lines. Look for adapters made from high-quality materials such as aluminum or stainless steel as they are durable and can withstand high pressure and temperature.
Fitting Type
There are two types of fittings commonly used in AN adapters – flare and o-ring. Flare fittings have tapered ends that create a seal when tightened while o-ring fittings have a rubber ring that provides a tight seal. Both types work well; however, flare fittings are more commonly used in high-performance applications.
Brand Reputation
With so many options available in the market, it can be overwhelming to choose one brand over another. It is always advisable to go for reputable brands that have been tried and tested by other users. This ensures that you get a quality product that will last longer and function correctly.
Compatibility with Other Parts
It is crucial to check if the adapter you are planning to buy is compatible with not only your car model but also other parts such as your radiator or fuel line if required. This will save you time and hassle of having to return or exchange parts if they do not fit together.
Budget Considerations
Last but not least, consider your budget before making a purchase decision. While quality should be your top priority, there are options available at different price points that offer good value for money. Do some research and compare prices from different brands before making a final decision.
In conclusion, purchasing 6An adapters for your 90 Fox Body transmission lines may seem like a daunting task at first, but with this buying guide in hand, I am confident that you will be able to make an informed decision and find the right adapters that meet your needs perfectly.
Author Profile
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Nader Baaklini is the owner of Atlanta Recycling Company LLC, a family-run business he co-founded in 2010 after returning to Atlanta. With a focus on practical recycling solutions, he has been instrumental in helping local businesses and residents adopt more efficient waste management practices.
Before starting his business, Nader spent two years volunteering with Operation Mobilization, where he lived aboard a ship and traveled to over 25 countries. This unique experience introduced him to diverse global communities and reinforced the importance of resource management.
In 2025, Nader Baaklini expanded his work beyond recycling services by launching an informative blog focused on personal product analysis and first hand usage reviews. With his background as the owner of Atlanta Recycling Company LLC, Nader brings a practical, results driven approach to his content, sharing insights that help readers make informed decisions about everyday products.
Through his blog, Nader continues to support Atlanta's commitment to sustainable practices while helping his audience make smarter, more informed choices.
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