The cylinder head is made of a lightweight, robust aluminum alloy with fantastic cooling performance. Camshafts are made of specifically Solid steel and therefore are driven by a timing belt. The 2JZ-GTE engine is supplied with 4 valves for each cylinder: two ingestion valves and two exhaust valves. Got Right https://jdm-toyota-2jz-gte-vvti-f71300.full-design.com/detailed-notes-on-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte-70917428