Proflow Cylinder Heads, AirMax-B 185, Aluminium, Bare Cylinder Heads, 61cc Chamber, 185cc Intake Runner, SB For Ford 289, 302, 351W, Pair

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"