The cylinder head is made from a light, robust aluminum alloy with fantastic cooling performance. Camshafts are created of specifically Solid steel and are driven by a timing belt. The 2JZ-GTE motor is provided with 4 valves for each cylinder: two consumption valves and two exhaust valves. Issue as pictured. https://kylerldtah.topbloghub.com/34297717/indicators-on-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte-you-should-know