The cylinder head is made of a light-weight, potent aluminum alloy with excellent cooling efficiency. Camshafts are made of specifically cast steel and therefore are driven by a timing belt. The 2JZ-GTE motor is provided with 4 valves per cylinder: two consumption valves and two exhaust valves. Affliction as pictured. https://jdm-toyota-2jz-gte-vvti-f65295.wizzardsblog.com/28142043/top-latest-five-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte-urban-news