(CBN stands for Cubic Boron Nitride and is best for cast-iron heads). All necessary parts are cleaned and inspected before final assembly to meet AERA specifications. We need the following to process your order: 1. Your vehicle's year, make and model 4. Each unit is inspected at every stage of rebuilding; starting from disassembly all the way through assembly and packaging.Cylinder heads that do not meet our quality control standards will be discarded and will not move to the next phase. If you do not have a core, feel free to message us. We recommend using the proper equipment and parts during installation and advise that you ensure your cooling system components i. Hoses, water pump, thermostat, radiator, etc. The item "Chevy GM GMC 350 5.7 VORTEC # 906 / 062 Cylinder Heads Pair" is in sale since Monday, December 31, 2018. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "josiv-81" and is located in Gwynn Oak, Maryland. This item can be shipped to United States.