Engine Cylinder HeadThe Edelbrock #5087 E 210 Cylinder heads are designed for use with 1955 1986 Small Block Chevy applications. The Edelbrock E Series cylinder heads are a step up in affordable performance from our E Street line. They feature larger runners for increased airflow, revised exhaust ports and larger diameter springs for higher lift camshafts, making them ideal for a spec series racer and larger displacement engines. The Edelbrock #5027 E Series Cylinder