NEW CHEVY RAPTOR VORTEC ALUMINUM 350 HEADS 64CC 2.02/1.60 THESE HEADS HAVE THE FOLLOWING: NEW RAPTOR HI-FLOW Aluminum 64CC cylinder heads. 190CC intake ports. Vortec design combustion chamber. Vortec style intake manifold bolt pattern. Angle or Straight plug design. Raised intake roof for enhanced air flow. Extra thick deck surface. Hardened intake and exhaust seats. Bronze thick wall guides. Scew in studs & guide plates. We install NEW COMP SERIES stainless steel swirl polished 2.05 / 1.60 intake & exhaust valves, hardened retainers, valve locks, hi-pro valve springs(max .530 lift) & premium Viton valve stem seals. All of our cylinder heads are vacuum tested!! 12 MONTH/12,000 MILE WARRANTY! NOTE: MUST USE .100" LONGER PUSH RODS WITH THESE CYLINDER HEADS. FLOW: 300 400 500 600 700 INTAKE 191.0 231.0 256.0 258.0 264.0 EXHAUST 140.0 168.0 184.0 192.0 200.0 * Intake flow data w/2.05" @ 28" of water * Exhaust flow data w/1.60" @ 28" of water
