Transmission Adapter Fit tings Front & Rear -6AN

The ICT BILLET Transmission Adapter Fittings Front & Rear -6AN (model 551114) is a precision-engineered pair of straight fittings designed for transmission cooler line installation in custom and modified vehicles. These adapters bridge the critical gap between your transmission's factory ports and modern -6AN (3/8" SAE) transmission cooler hose systems, making them essential for engine swaps, cooling system upgrades, and high-performance builds where OEM transmission cooler lines no longer fit or function adequately.

Constructed from lightweight yet durable aluminum in a natural finish, each fitting features a 6 AN male connection on one end and a 1/4 inch NPT (National Pipe Thread) male O-ring port on the other—a configuration that allows direct attachment to most transmission case ports without modification. The straight design eliminates unnecessary bends in your cooler line routing, reducing pressure loss and turbulence while simplifying installation in tight engine bays. The O-ring face seal on the NPT side ensures a leak-free connection critical to maintaining proper transmission fluid cooling, preventing thermal breakdown that can compromise shift quality and overall transmission longevity.

Mechanics and engine builders favor this pair for LS, LT, and other small-block swaps into older chassis, where transmission cooler port orientation differs from the donor platform. Installation is straightforward—thread the NPT male end directly into your transmission case ports and crimp or connect -6AN hose to the SAE male end. Weighing just 0.06 lbs per pair and measuring 2.15 x 0.85 x 2.9 inches, these fittings occupy minimal space while delivering professional-grade reliability for street, strip, and competition vehicles relying on consistent fluid temperature management.