The cylinder head is product of a lightweight, strong aluminum alloy with great cooling efficiency. Camshafts are created of specifically Solid steel and therefore 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. Wonderful support. https://jdmtoyota2jzgtevvtiforsal83512.prublogger.com/27704049/not-known-facts-about-jdm-toyota-2jz-gte-vvti-for-sale-built-2jz-gte