The cylinder head is made of a light, potent aluminum alloy with excellent cooling effectiveness. Camshafts are made of specially cast steel and are driven by a timing belt. The 2JZ-GTE engine is provided with 4 valves for every cylinder: two ingestion valves and two exhaust valves. Terrific practical experience. https://jdm-toyota-2jz-gte-vvti-f15925.eedblog.com/28147423/the-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte-diaries