Performance World 70180A 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. 70cc 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 1.25" OD springs for hydraulic flat tappet (non-roller) cams up to .525" lift. Each pair comes assembled with a detailed flow sheet and assembly blueprint. Vacuum tested. Download Data here - DOWNLOAD Sold as pairs.