ICT Billet -6AN Flare to 1/4 NPSM Transmission Adapter Fittings (Aluminum) 551114

Overview

ICT Billet offers a precision-made solution for builders who want to tailor custom -6AN transmission lines. Machined from aerospace-grade billet aluminum in the USA, these adapters deliver a clean, consistent fit and a tactile, high-quality finish that you can both see and feel.

Designed to simplify your fabrications, these fittings enable straightforward planning of line routing in tight engine bays or tight chassis spaces. They pair well with a variety of transmission configurations, giving you flexibility without compromising on the visual and tactile quality of the hardware.

What makes them special

• Aerospace-grade billet aluminum stock for solid, consistent tolerances
• Made in Wichita, Kansas, USA, ensuring traceability and quality control
• Includes 2 fittings and O-rings for a ready-to-install kit
• -6AN flare to 1/4" NPSM connections for versatile line routing
• Rugged yet lightweight construction suitable for daily driving or spirited uses

Compatibility & fit

These fittings are designed to work with a wide range of popular transmissions, making them a versatile choice for mixed platforms or retrofits. They are compatible with GM and other major transmission case holes and can be integrated into several classic and modern setups.

• GM transmission families including TH350, TH400
• 4L60E and 700R4 families
• 200-4R, TR6060, Ford AOD 4R100, 4R70W
• C5 transmissions and related applications

What you get

• Two -6AN to 1/4" NPSM fittings
• O-rings for sealing and a secure, leak-resistant installation

Real-world scenarios

In a performance build, these fittings can simplify routing for custom transmission lines, reducing clutter and ensuring reliable seals in hot, high-vibration environments. In a retrofit or restomod, they offer a clean, precise connection option when mid-year gaps or space constraints demand adaptable components. The machined finish adds a refined look that complements billet hardware throughout the drivetrain.

Installation tips

Prepare mating surfaces, check O-ring seating, and hand-tighten before final torque as required by your application. The included O-rings help ensure a workable seal from the start, while the -6AN flare threads provide robust engagement with compatible hoses or lines.