Originally developed on our 2JZ race engines to save additional weight, we had many requests to developed these for the consumer market. The foundation for these stunning covers is a billet aluminum base that is CNC machined to offer proper gasket sealing with the head using the factory gasket. We then hand form a smooth sheet metal top that is then tig welded before being mirror polished. The result is a set of valve covers that are 2lbs lighter than the factory units, and more visually appealing. The sheet metal construction allows the valve covers to be used with or without a fill cap, and -10 or -12AN fittings to be placed at the customers requested location for crankcase ventilation (standard configuration is smooth).