Sandwich Filter Adapter 22mmx1.5mm Filter Thread

The SETRAB Oil Coolers Sandwich Filter Adapter with 22mm x 1.5mm filter thread is a precision-engineered oil system component designed to integrate remote oil filtration into high-performance cooling setups. This aluminum sandwich adapter mounts directly between the engine block and oil filter, routing oil flow through external cooler circuits before returning to the engine—a configuration essential in motorsport, automotive tuning, and heavy-duty applications where thermal management directly impacts engine longevity and performance.

The 22mm x 1.5mm center thread is the standard filter mounting interface for many European and Japanese performance engines, while the dual 12 AN male inlet and outlet ports accommodate -12 hose fittings commonly used in aftermarket cooling systems. Constructed from aluminum, the adapter offers weight savings over cast iron alternatives while maintaining structural integrity under pressure cycling. The natural (uncoated) aluminum finish requires proper system flushing and inhibitor use to prevent galvanic corrosion when mixed with ferrous components. At 0.67 lbs and compact dimensions (4.1 x 3.1 x 6.15 inches), installation in tight engine bays remains practical without sacrificing flow path efficiency.

This adapter serves builders developing custom oil cooling systems on turbocharged engines, track-prepared vehicles, or high-displacement builds where factory cooling cannot manage sustained heat loads. Engine builders and tuners rely on sandwich adapters to establish controlled oil temperature ranges—typically 180–220°F—which optimize viscosity, reduce wear, and extend service intervals. Proper installation includes verifying thread compatibility with your specific engine block, confirming AN fitting sizing matches your cooler inlet/outlet ports, and using appropriate thread sealant (PTFE tape or anaerobic compound) to prevent leakage under pressure.