Oil Sandwich Adapter

The TRANS-DAPT Oil Sandwich Adapter (Part No. 1313) is a purpose-built oil cooler mounting solution designed to integrate oil filtration and cooling systems into vehicles that lack factory provision for them. This aluminum sandwich adapter threads directly onto the engine block's 3/4-16 center port, creating a compact junction point between the engine and auxiliary oil management components. The sandwich configuration allows simultaneous connection of inlet and outlet lines without requiring multiple block modifications.

The adapter features dual 3/8 NPT female ports for both inlet and outlet connections, enabling flexible plumbing configurations for oil coolers, remote filters, or combination systems. The 3/4-16 center thread accepts standard engine block fittings found on most automotive and light truck engines, while the NPT female ports accept industry-standard 3/8-inch male fittings used across oil cooling and filtration equipment. Natural aluminum construction provides corrosion resistance typical of TRANS-DAPT's product line, with a compact 4.8 × 3.3 × 5.25 inch footprint that fits tight engine bay layouts.

This adapter serves builders and technicians upgrading cooling capacity on naturally aspirated or modified engines, street rods, off-road vehicles, and performance applications where thermal management demands exceed original equipment design. The sandwich adapter approach minimizes installation complexity compared to block-mounted tees or manifold systems, allowing the cooler and lines to be positioned remotely from the engine for optimal heat dissipation. Each adapter ships individually and includes the threaded port itself, with installation requiring only standard wrenches and compatible hose fittings.