Performance World 64180 SB Chevrolet 180cc Cylinder Heads pair (bare)

SB Chevrolet 180cc Bare 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. Each head comes with a detailed flow sheet. Ready for assembly and sold as pairs. Download Data here - DOWNLOAD Download Installation Tech here - DOWNLOAD