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Q:Edelbrock site says p/n 60979 is an assembled cylinder head. Your website listing has it as a 'bare' assembly.
A:Sorry, for the inconvenience caused. This Edelbrock Single Cylinder Head - part# 60979 incorporates a high-quench 64cc combustion chamber design. It promotes more uniform atomization of the air / fuel mixture for more power. It is assembled with one-piece stainless steel valves, 1.46 valve springs, retainers and locks. It works with most exhaust manifolds and headers and has intake and exhaust ports that are 0.200'' taller. It produces good horsepower up to 6,000 RPM. The 64cc combustion chamber gives about 9.2:1 compression ratio with stock pistons in a 350 cubic inch engine. The diameter of the intake valve is 1.940 and the exhaust valve is 1.550. The volume of the intake runner is 170, exhaust runner is 70cc and the volume of the combustion chamber is 64cc. The intake and exhaust runners are CNC-machine profiled for superior flow and performance. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.