GENUINE MOCAL 1/2BSP OIL COOLER KIT. Golf Mk1 / Mk2 / Mk3. Corrado 16v / G60. Classic Mk1/Mk2 Scirocco 1974 - 1992. Exact cooler size required depends upon: The type of use, ambient temperature, spec of the engine (internal friction, rev range, power etc), airflow through the cooler and over the sump.