2JZ VALVE GUIDES. BC premium valves guides are made from Manganese Silicon Aluminum Bronze alloy CNC machined to exacting tolerances. BC guides are resistant to cracking and corrosion, while reducing friction and insures high lubrication even at elevated engine temperatures and rpm's. The perfect replacement to worn or damaged guides and 100% compatible with BC's lineup of stainless steel valves. 6.0mm INTAKE (Toyota 2JZGTE/GE) QTY 12 6.0mm EXHAUST (Toyota 2JZGTE/GE) QTY 12