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: 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