The cylinder head is made of a light, robust aluminum alloy with very good cooling effectiveness. Camshafts are made of specially cast metal and they are pushed by a timing belt. The 2JZ-GTE motor is supplied with four valves per cylinder: two intake valves and two exhaust valves. Astounding assistance. https://kylerrshwj.blogs-service.com/59193160/the-definitive-guide-to-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte