Performance World 64180A-2 SB Chevrolet 180cc Cylinder Heads pair (complete)

SB Chevrolet 180cc Aluminum Cylinder Heads. Fits 4.00" and larger bore. 2.02" intake, 1.60" exhaust. 64cc combustion chambers. Manufactured from A356-T6 aluminum, they feature bronze guides, straight plug design and can accept center bolt or perimeter bolt valve covers. Assembled with 1.47" OD springs for hydraulic roller cams up to .625" lift. Requires 7/16" stud rocker arms. Each pair comes assembled with a detailed flow sheet and assembly blueprint. Vacuum tested. Sold as pairs. Download Data here - DOWNLOAD