Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod.


  • Material: A356 Aluminium
  • Combustion Chamber: 60cc
  • Intake Port Volume: 175cc
  • Intake Port Dimension: 2.00" x 1.18"
  • Exhaust Port Volume: 66cc
  • Exhaust Port Dimension: 1.32" H x 1.27" W
  • Spark Plug Location: Angled
  • Intake Valve Diameter: 2.02"
  • Exhaust Valve Diameter: 1.60"
  • Valve Stem Diameter: 11/32"
  • Valve Spring Pocket I.D.: 1.49"
  • Valve Guide Material: Manganese Bronze
  • Valve Guide O.D.: .530" (.570" at base)
  • Rocker Stud Thread Size: 7/16" x 14
  • Valve Angle: 20
  • Deck Thickness: .625"