The ADC Oil Cooler adapter is a direct replacement for Lycoming adapter LW14959 which is no longer produced. The ACD adapter allows installation of an oil cooler on Lycoming 0-235 and 0-290 series engines providing muchneeded oil cooling and enhanced performance. The ADC adapter is machined from solid bar stock, rather than cast like the Lycoming adapter, thus producing a stronger and leak resistant product. The ADC kit is STCs for all 0-235 (E-223) and 0-290 (E-229) and is ideal for certificated and homebuilt aircraft using these engines. It will adapt to virtually any oil cooler and attaches to the engine underneath the oil screen housing.