XiTuanYuan PTFE Transmission Cooler Line Kit — 70-inch 6AN Stainless-Braided Hoses, Billet Adapters

High-pressure, corrosion-resistant 70-inch PTFE transmission cooler hoses with 6AN fittings for GM and Ford applications.

This XiTuanYuan transmission cooler line kit supplies two long, stainless-steel braided PTFE hoses and a full set of billet adapters to route ATF to and from an auxiliary cooler. Built for durability and broad compatibility, it replaces factory soft lines with a tougher, higher-temperature solution that reduces leak risk and helps maintain gearbox operating temperatures under load.

Will this kit fit my transmission and vehicle?

The kit is designed for many common automatic transmissions and late-model vehicles. It includes adapters and fittings to match several GM and Ford bellhousing/transmission ports, but confirm thread types and lengths against your vehicle before ordering.

• Compatibility: GM Turbo 350 (partial 1/4" NPT), Turbo 400, Turbo 200/200R4, Powerglide (partial 1/4" NPT), 700R4, 4L60/4L60E/4L65E/4L80E, Ford C4/C6/AOD.
• Also suitable for many GM Chevy models from 1996–2021.
• Includes various 1/4" NPT and 3/8" NPT adapters to bridge stock ports and 6AN fittings.

How is the hose constructed and why does that matter?

The hoses combine a PTFE inner liner with a 304 stainless steel braided jacket for strength and chemical resistance. That construction offers high-pressure tolerance, excellent heat resistance, and reduced permeation of transmission fluid compared with rubber lines.

• Inner PTFE core: smooth flow, chemical inertness, temperature stability.
• 304 stainless braid: abrasion protection and kink resistance.
• 6AN fittings: common performance-standard size for secure, leak-resistant connections.

What parts are included and how will they simplify installation?

The kit arrives with two 70-inch hoses and a comprehensive assortment of billet adapters so you can adapt factory ports to 6AN connections. Having multiple adapter styles reduces the need to source additional fittings during installation.

• Two 70" hoses with ~3/8" inner diameter and 6AN ends.
• Four AN-6 flared to 1/4" NPT billet adapters and two AN-6 flared to 3/8" NPT adapters.
• Four 90° AN-6 reverse-flare to AN-6 flared adapters and two aluminum 4L80E adapter accessories.

How durable is this kit and what support comes after purchase?

Every hose uses resilient materials intended for long service life in demanding environments such as towing, performance driving, and hot climates. XiTuanYuan backs the assembly with a one-year warranty and advises verifying hose and fitting measurements prior to installation.

• Materials: PTFE inner liner with 304 stainless exterior braid for longevity.
• Designed to resist leaks, abrasion, and high operating pressures.
• Includes 1-year warranty; check dimensions before ordering to ensure compatibility.

Who is this for: This kit is aimed at mechanics, restorers, and performance enthusiasts who need a robust aftermarket transmission cooler plumbing solution for GM and Ford automatic transmissions. If you want to upgrade from OEM rubber lines to a higher-temperature, low-permeation PTFE hose with plenty of adapter options for common transmissions, this XiTuanYuan 70" 6AN kit provides a ready-to-install, durable option.