Proflow Cylinder Heads SuperMax 225, Bare, Aluminium, SB Ford 302-351 Cleveland,

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Proflow Cylinder Heads, SuperMax 225, SB Ford 302, 351C, Bare 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: 72cc 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