Oil Block Adapter Specification This oil block replaces the stock 1JZ-G(T)E and 2JZ-G(T)E oil housing mounting directly to the block adding two Dash 12 fittings for oil lines. Benefits of using the block are twofold : The stock item is a major source of weakness often failing and causing catastrophic engine damage due to oil loss. This block removes the need for a sandwich plate again another weakness within a lubrication circuit. A sound investment to protect your Toyota JZ engine whilst adding functionality!