-4 AN 90° Fitting
These Aluminum Fittings are specially designed to work with our Braided Stainless Steel Lines.They are compatible with the following fluids:
High octane gasoline, up to 117 Octane
Ethanol (E85 or E100)
Engine oil (synthetic or regular)
Hydraulic clutch fluid
Air Conditioning Refrigerant (R12 or R134A)
Power steering fluid
Air and water, of course
Most of the braided stainless steel lines and fittings that you can buy actually have a rubber (EPDM or NBR) interior. Some competing products advertise a special coating on the inside of the rubber to make them resistant to ethanol and certain other chemicals. We think this is wrong wrong wrong. Why would you use a material that isn't 100% resistant to the chemicals in your application for absolutely no reason? Our PTFE lines are superior to our competitors rubber lines in every way and they cost less too!
Our lines are made of high-quality PTFE on the inside that gives them high chemical and heat resistance, along with a braided stainless steel outside which gives them high durability, extreme pressure resistance, and a professional and high-tech appearance. Be careful when buying Braided Stainless Steel Hose because they are not all the same! Make sure yours are compatible with the fluid, pressure and temperature in your application.
Braided Stainless Steel PTFE lines like ours are great for replacing many factory rubber hoses such as rubber fuel lines, brake lines, and clutch lines. (Crimp-on fittings recommended for brake lines, nitrous lines, and other applications with over 500 PSI.) PTFE does not deteriorate or bulge with age like rubber does, and has far superior chemical resistance. The stainless steel outside keeps the inner diameter uniform, allowing faster and more efficient fluid transfer (this means a firmer, more responsive pedal feel when replacing brake lines.) The stainless steel outside also keeps the lines looking shiny, new and professional all the time, and prevents damage to the inner hose.
Question: Are your braided stainless steel lines Teflon?
They are chemically identical to Teflon, however we can't call them Teflon because Teflon is a registered trademark of DuPont.
Question: What can I do with your lines and fittings?
Use them to replace your fuel lines and convert your car to run on Ethanol without worrying about breaking down your inferior factory lines
Deliver the methanol in your custom methanol injection kit
Install an aftermarket oil cooler
Install an aftermarket transmission cooler
Run the water lines for a water to air intercooler
Repair or replace the lines in your hydraulic clutch system
Repair or replace the lines in air conditioning system
Convert all your boost/vacuum hose to stainless steel lines to finally put an end to boost/vacuum leaks
Pressure Rating: 1500 PSI - note: crimp-on fittings are recommended for applications over 500 PSI.
Temperature Rating: -100F to 500F
All of our bending line termination adaptors (45, 90, 180, etc) come with a swivel on one end so you can turn the outlet without re-installing.
How To Install Fittings
Update! Our fittings have been upgraded with our new Triple Grip design. The brass compression fitting still compresses, grips and seals along the wall of the PTFE tube and also grips the stainless steel braids, however it now also compresses, grips and seals the edge of the PTFE line against the top part of the aluminum fitting. Some other lines you find online only grip in one place!
Our fittings are a three-piece design. Properly installed, the stainless steel braids are gripped by the fitting; do not trim down the stainless steel.
Slide the outside of the fitting over the stainless steel line.
Carefully feather out the stainless steel braiding and insert the PTFE line into the middle part of the fitting. The PTFE line must slide all the way down into the middle part of the fitting. The edge of the PTFE line should protrude approximately 1/8" from the middle part of the fitting, so that it can be opened up and gripped against the top part of the fitting.
Slide the end of the fitting through the middle part of the fitting, all the way into the PTFE line. You'll notice the PTFE line being opened up by the top part of the fitting, which helps it seal in the third place when you tighten the fitting.
Be careful not to scratch the finish on the fitting when tightening. They make special wrenches for this, but we prefer an old rag wrapped around the fitting and a regular wrench.
If you open the fitting again after tightening, you will notice that the PTFE line has been compressed between the top and middle part of the fitting.
Please check the following before you start, and check again if you have any problems.
Highly Recommended: Use our AN Fittings Pressure Test Kit to pressure test your built lines before installing. This kit will help you troubleshoot any problems with assembly and prevent a nasty fluid spill.
PTFE and Stainless Steel lines should not be bent in a short radius. If you need a quick bend in your line, install some extra fittings instead of bending the line.
Be careful not to kink the line during installation. The line is firm and hard to kink, but if you do kink it you might ruin it.
Make sure the line is square where it was cut. If the line is cut at a slight angle, it might result in an improper seal, resulting in leakage or failure. We use a cutoff saw that holds the line down to make sure the cut is perfectly square and clean. If you re-cut the line, make sure it's square.
Make sure you don't get any of the stainless steel braids caught up in the threads. If you get any steel in the threads, it will prevent proper tightening, resulting in leakage and most likely damage to the threads.
Depending on how you cut the line and how much the PTFE inner moves around in the SS braids (for short lines), you might end up with a situation where the SS needs to be trimmed down slightly. If you have trouble tightening fully, you might try trimming the SS slightly. Note that it should still be long enough to be compressed against the middle part of the fitting.