King Ford/Mazda Duratec 2.0/2.3 DOHC (Size 0.50) Silicon Bi-Metal Aluminum Main Bearing Set King Engine Bearings Sale! from 7999 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. King Ford/Mazda Duratec 2.0/2.3 DOHC (Size 0.50) Silicon Bi-Metal Aluminum Main Bearing Set