Proflow Cylinder Heads, LS1 AirMax 235, Aluminium, 64cc Chamber, 210cc Intake Runner 15deg, Chevrolet For Holden, Pair

LS1 AirMax 210, Aluminium Cylinder Heads 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. Proflow's 210 AirMax LS1 Cylinder Heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM. SPECIFICATIONS Combustion Chamber 64 cc Intake Port Volume 235 cc Intake Port Dimensions 3.19” (H) x 1.015” (W) Exhaust Port Volume 82 cc Exhaust Port Dimensions 1.40” (H) x 1.66” (W) Spark Plug Location OEM Intake Valve Diameter 2.02” Exhaust Valve Diameter 1.60” Valve Stem Diameter 8 mm Valve Spring Pocket ID 1.50” Valve Guide OD 0.570” Rocker Stud Thread Size OE LS1 Style Valve Angle 15° Deck Thickness 0.425”