Cal Custom 18 Inch Dual Pass Finned Aluminium Transmission Oil Cooler

• Heat sink design produces high heat transfer with minimal airflow
• External and internal heat dissipating fins
• Compact 3” diameter core can be mounted in a variety of locations including frame rail, radiator bottom and floorboards.
• Can cool transmission fluid, fuel, engine oil, power steering or gear lube
• Satin aluminium finish
• Made from very high quality thick aluminium to prevent warping or twisting
• Dual pass design, ¼” NPT

Part Number: CAL-3878

• Application: This 18 inch Cal Custom dual pass cooler suits transmission fluid, engine oil, power steering or gear lube cooling on performance builds and tow vehicles where higher heat load calls for a dual pass core rather than the single pass design used on the shorter coolers in the range.

• Size/Spec Context: The dual pass design routes fluid through the core twice, giving stronger heat rejection than a single pass unit of similar length. At 18 inches with a 3 inch diameter core, it suits mid to larger capacity cooling needs where mounting space allows a longer core along the frame rail or radiator support.

• Construction Note: Built from thick, high quality aluminium with external and internal heat dissipating fins to resist warping or twisting under sustained heat cycling. Fittings are 1/4 inch NPT.

• Fitment Note: Suits transmission, engine oil, power steering and gear lube applications. Confirm your existing line size and fitting thread before ordering, as 1/4 inch NPT fittings will need matching adaptors if your lines use a different thread standard.

• What to Pair With: Commonly paired with transmission cooler lines, NPT to hose barb adaptors and mounting brackets to complete the install.

• Practical Buyer Tip: Because the dual pass design creates more internal restriction than a single pass cooler, confirm your pump or transmission can handle the added back pressure before fitting on high flow applications.