Oil Cooler Filter Adapter

oil cooler
A heat exchanger for cooling oil. Most automatic transmissions are equipped with an oil cooler that's located inside the radiator. Since the radiator usually runs close to 200 degrees, the amount of "cooling" this kind of setup provides is questionable.
This looks like a small Radiator used to cool off the engine oil or the Automatic transmission fluid. As air passes through the cooler, the temperature of the oil in the cooler is reduced. Some units reduce the temperature of the manual Gearbox and Differential lubricants in racing cars.

adapter
A person who adapts a text to make it suitable for filming, broadcasting, or the stage
An adapter or adaptor is a person that adapts or a device that converts attributes of one device or system to those of an otherwise incompatible device or system.
device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible
A device for connecting pieces of equipment that cannot be connected directly
arranger: a musician who adapts a composition for particular voices or instruments or for another style of performance

filter
A screen, plate, or layer of a substance that absorbs light or other radiation or selectively absorbs some of its components
an electrical device that alters the frequency spectrum of signals passing through it
A device for suppressing electrical or sound waves of frequencies not required
device that removes something from whatever passes through it
remove by passing through a filter; "filter out the impurities"
A porous device for removing impurities or solid particles from a liquid or gas passed through it