Universal Sandwich Adap.

The PERMA-COOL Universal Sandwich Adapter is a versatile oil cooler mounting solution designed for engine builders, performance shops, and enthusiasts who need reliable thermal management on custom or modified powerplants. This sandwich-style adapter installs directly into your engine block's oil passage, creating a convenient integration point for aftermarket oil coolers without requiring extensive plumbing modifications or block modifications. Whether you're upgrading a street rod, race engine, or performance street vehicle, this universal adapter simplifies the installation process and maintains proper oil temperature during sustained driving or competition.

Constructed from durable aluminum in natural finish, the Universal Sandwich Adapter features 3/8 inch NPT female inlets and outlets, providing standard thread compatibility with most aftermarket oil cooler lines and fittings. The sandwich design allows hot oil from the engine to flow through an external cooler before returning to the pan, effectively reducing operating temperatures and extending engine life under load. Aluminum construction offers excellent thermal conductivity while remaining lightweight, and the NPT threads ensure secure, leak-free connections when properly fitted with quality hose and fittings. Weighing just 1.19 lbs and measuring 5.25 x 2.8 x 6 inches, this compact adapter fits into tight engine compartments without excessive bulk.

Mechanics, engine builders, and performance-focused vehicle owners benefit most from this universal sandwich adapter when retrofitting oil cooling systems onto engines lacking OEM cooler provisions. Installation compatibility depends on your specific engine block's threaded oil passage availability; verify your engine has a compatible 3/8 NPT port before purchasing. This adapter is commonly paired with plate-style or tube-and-fin coolers and works with both street and racing applications where temperature control is critical. Proper thread sealant and quality braided hose are recommended for optimal sealing and durability during high-performance use.