Performance World 65210 Pro-Series PRO210 SB Chevrolet 210cc Cylinder Heads pair (bare)

SB Chevrolet Pro-Series PRO210 210cc Aluminum Cylinder Heads. Fits 4.00" and larger bore. 2.08" intake, 1.60" exhaust, 65cc combustion chambers. 8mm guides, .250" raised exhaust ports, 1.58" spring pocket, 3/4" thick deck. Designed for ULTIMATE flow. Manufactured from A356-T6 aluminum. Each head comes with a detailed flow sheet. Ready for assembly and sold as pairs. Download Data here - DOWNLOAD Download Installation Tech here - DOWNLOAD Check piston to valve clearance in all applications.