The Edelbrock part # 77589 Small Block Chevy Victor Jr. 215cc cylinder head is an affordable version that will still allow for maximum power when used in competition and ultra high-performance street applications. This cylinder head has the potential of 530-580 hp out-of-the-box, for a cost effective, race-winning set-up. These cylinder heads feature angled spark plug holes and accept standard 23° valvetrain hardware. The 77589 cylinder heads have a 64cc combustion chamber and come with springs for hydraulic roller camshafts. The 64cc chambers yield about 12.5:1 compression with a 12cc domed piston in a 350 V8.