This is the factory oil cooler. We highly recommend replacing this when doing any engine replacement to ensure no debris is ingested into your new motor setup because of using your old cooler. The evo oil coolers are not able to be cleaned therefor the reuse of one may cause catastrophic engine damage if reused! The oil cooler lines however can be flushed and cleaned but, please do so at your own risk. Please be sure to pick the correct model below.