Autoutfit AN6 Transmission Cooler Line Kit — 15FT Black Nylon Braided Hose, 4L60E/4L65E Fit, Aluminum AN Fittings

Autoutfit AN6 15FT Transmission Cooler Line Kit is a complete braided hose and fitting set designed to replace or upgrade cooler lines on 4L60E and 4L65E transmissions.

This kit supplies 15 feet of premium -6 AN black braided hose plus a full complement of straight and 90° AN ends and transmission/radiator fittings to create a durable, routed cooler line system. Built with a CPE rubber inner core, 304 steel wire reinforcement and a nylon outer braid, the hose balances flexibility with abrasion and pressure resistance. The lightweight aluminum alloy adapters make installation tidy and corrosion-resistant when compared with plain steel fittings.

Will this kit fit my 4L60E or 4L65E transmission?

The Autoutfit kit is engineered for universal compatibility with 4L60E and 4L65E transmissions when used with the correct factory or aftermarket ports. Before buying, compare the included fitting types and lengths to your vehicle's ports and routing. The package contains both short 1/4" NPSM transmission fittings (with O-ring) and longer 1/4" NPT radiator fittings (without O-ring) so you can match factory interfaces.

• Includes 2 short 1/4" NPSM x -6 transmission fittings (O-ring style)
• Includes 2 long 1/4" NPT x -6 radiator fittings (non O-ring)
• Contains both straight and 90° AN-6 hose ends for routing flexibility
• 15-foot hose gives ample length for custom routing and spare cuts

How durable and heat-resistant is the braided hose?

The hose construction combines a chemical- and oil-resistant CPE rubber inner core with a layer of 304 stainless steel wire and a protective nylon outer braid. That multilayer design improves burst strength and protects against chafing from engine bay edges and hot components. While not a replacement for hard lines in extreme motorsport setups, it offers robust durability for street, tow, and light performance use.

• CPE rubber inner core resists oil and transmission fluid damage
• 304 steel wire reinforcement increases pressure tolerance
• Nylon outer braid prevents abrasion and UV wear
• Aluminum AN fittings reduce corrosion and weight

What comes in the box and what tools do I need?

The kit ships with one 15-foot length of -6 AN steel black braided hose, two straight AN-6 hose ends, two 90° AN-6 hose ends, two short 1/4" NPSM x -6 transmission fittings (with O-ring), and two 1/4" NPT x -6 radiator fittings. Basic hand tools, an AN hose assembly wrench or proper-sized wrenches, and hose cutters are usually sufficient for most installs. A torque wrench and thread sealant for NPT fittings are recommended to ensure leak-free connections.

• 1x 15' -6 AN black braided hose
• 2x AN-6 straight hose ends and 2x AN-6 90° hose ends
• 2x 1/4" NPSM x -6 transmission fittings (short, O-ring)
• 2x 1/4" NPT x -6 radiator fittings (long, non O-ring)

Who is this for: The Autoutfit AN6 15FT Cooler Line Kit is aimed at car owners, mechanics, and hobbyists who need a reliable replacement or upgrade for transmission cooler plumbing on 4L60E/4L65E applications. It suits DIY installers and professional shops wanting flexible routing, corrosion-resistant fittings, and extra hose length for custom setups. If you require factory-style hard lines for extreme racing or specific OEM fittings not listed, compare part numbers and pictures before purchasing.