The cylinder head is crafted from a light-weight, powerful aluminum alloy with great cooling effectiveness. Camshafts are made of specially cast steel and so are driven by a timing belt. The 2JZ-GTE engine is equipped with four valves per cylinder: two intake valves and two exhaust valves. Ailment as pictured. https://jdm-toyota-2jz-gte-vvti-f70245.vidublog.com/27605878/jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte-no-further-a-mystery