Edelbrock 5089 SB Chevy E-Street 64cc Cylinder Heads

  

Edelbrock 5089 SB Chevy E-Street 64cc Cylinder Heads. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. For use on pre-pollution controlled vehicles only.

Outside Diameter of Outer Spring (in). Number of Springs Per Valve.

Rocker Arm Nut Thread Size. Designed for use with hydraulic flat tappet camshafts less than. Requires use of hardened pushrods. The valve and seat combination, used in these heads, is not recommended for use with a hydraulic or mechanical roller camshaft.