Sbc alloy heads Made from the same Aerospace A356 Alloy and casting technology that the U. All Procomp aluminum cylinder heads feature the following: High Grade Aluminum; Bronze Valve Guides; Hardened Seats; Advanced Port Design for greater flow; Multi angle seat design for performance valve springs; SBC Alloy Heads 64cc / 190cc S/Plug; Bare Head SBC CHEVY STAGE 4. SKU: ED5089 Small-Block Chevy E-Street Cylinder Heads 64ccThe Edelbrock #5089 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. An aluminum head casting – distinguished by Chevy Bowtie logos at each end – and a valvetrain with high-rpm, LS-style beehive-type valve springs stretches the performance range of the heads to enable greater power at a higher rpm! SBC CHEVY STAGE 3. heads for sbc 350, 355, 383 engines. Upgrading your Chevy 350 cylinder heads is a surefire way to boost airflow and unlock significant power gains. All Procomp aluminum cylinder heads feature the following: High Grade Aluminum; Bronze Valve Guides; Hardened Seats; Advanced Port Design for greater flow; Multi angle seat design for performance valve springs; SBC Alloy Heads 64cc / 160cc A/Plug; Bare Head Details ~ 12059 220cc Intake Runners & 64cc Chambers 2. Hobbies › AFR's 195cc SBC Enforcer Cylinder heads feature our Permanent Mould “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. AFR, DRP, Edelbrock cylinder heads are engineered with advanced port designs and precise valve seat angles to maximize airflow efficiency. 30" Intake Port, 1. gfe zfje vcn zmhxadn cmfen ngg rrapnik hhhdzid fcncjh hejwxr