Proflow Cylinder Heads SuperMax 225, Assembled, Aluminum, SB Ford 302,351 Cleveland 3V 60cc Chamber, 225cc Intake Runner, 630HP, Pair

Proflow Cylinder Heads, SuperMax 225, SB Ford 302, 351C, Assembled 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. Material: 356 Alloy, T6 Chamber Volume: 60cc Complete Assembly options available in all chamber sizes Intake Runner Volume: 231CC Intake Port location raised .125” 3V design Minimum Cross Section: 2.53 square inches MCSA Exhaust Runner Volume: 125cc - high velocity Exhaust Port Location Raised .080” (near stock location) Valve sizes Intake 2.10” (45 degree seat, custom 5 angles) Exhaust 1.650” (45 degree seat ) Valve Guide Angles: Canted Valve angles Intake 10 x 4 degrees Exhaust: 9.5 x 3.0 degrees Valve Guides: Manganese Bronze .502” x 11/32” stems Valve Seat Inserts: Intake: 2.250” x 1.880 x 3/8 (Durabond 7000) Exhaust: 1.680” x 1.430” x 3/8 Spark Plugs: relocated for efficient fast burn ¾ reach, 5/8 hex, washer seat (NGKBCP7ES) Spring Pads: 1.570” od/.560” id Valve Spring Height: 1.960” (with stock length valve) Pushrods 5/16” or 3/8” (check required length) Rocker Arm Studs 7/16” unc Rocker Arm Type 7/16” stud mounted roller rockers (1.73 ratio) or Yella Terra Planuim #6321 OR T&D shaft rocker sysytems