GR Yaris Closed Decking service G16E-GTSFor GR Yaris, GR Corolla, Lexus LBX Morizo RR G16E GTS engine Our Closed Decking service for Toyota GR engine blocks is designed to reinforce the engines structural integrity, especially at the top of the cylinder walls where combustion pressure is at its peak. This process involves machining the top plane of the engine case to accept precision CNC machined inserts, providing full support to the cylinder walls and minimizing the risk of flexing or