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, 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.

Specifications:

  • Material: A356 Aluminium
  • Combustion Chamber: 61cc
  • Intake Port Volume: 185cc
  • Intake Port Dimension: 2.10" x 1.25"
  • Exhaust Port Volume: 65cc
  • Exhaust Port Dimension: 1.35" H x 1.35" W
  • Spark Plug Location: OEM
  • Intake Valve Diameter: 2.02"
  • Exhaust Valve Diameter: 1.60"
  • Valve Stem Diameter: 11/32''
  • Valve Spring Pocket I.D.: 1.55"
  • Valve Guide Material: Manganese Bronze
  • Valve Guide O.D.: .500" (.560" at base)
  • Valve Angle: 20
  • Deck Thickness: .750"

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