Proflow Cylinder Heads, SuperMax 210 CNC, SB Chev, Aluminum, Assembled, 64cc Chamber, Angle Plug, 210cc Intake Runner, 600HP, Pair

Proflow Cylinder Heads, SuperMax 210 CNC, SB Chev Aluminum, Assembled, 64cc Chamber 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. These heads are capable of producing over 600 HP straight out of the box! SBC 210 Angle Plug Specifications & Features: Material A356 Aluminum Intake Port Volume 210cc Intake seat size 2.08 Exhaust seat size 1.6 Intake Port Dimension 2.200" H x 1.310" W x 3/8 Radius Intake Port Location Stock Exhaust Port Volume 80cc Exhaust Port Dimension 1.420" H x 1.545" W Exhaust Port Location 0.250" Raised Combustion Chamber Size 65cc or 72cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 23° Valve Spring Pocket Diameter 1.580" O.D Max Valve Spring Pocket Machining 1.750" O.D Warning: Do not machine spring pad any deeper. Deck Thickness .750" Minimum Bore Diameter 4.000" Flat Mill .006" per cc 60cc Maximum Angle Mill .009" per cc 55cc Maximum Note: Angle mills might require .120" Thick intake gasket. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Not Emissions Complient Plug Angle Plug option 8mm Bead Lock Intake Valve, 2.080" x 5.000" Overall Valve Length 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400 Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D 10° Bead Lock Valve Keepers 7/16" Rocker Studs 5/16" Guide Plates Viton Valve Seals .600" O.D x .495" I.D Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D Powder Metallurgy Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep Powder Metallurgy Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit MIC heads. Exhaust Port Gasket, Fel-Pro #1405 Head Gasket, 350cid Fel-Pro #1003 Head Gasket, 400cid Fel-Pro #1014 SB Chevy Head Bolt Kit, ARP #134-3701 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 Head Bolt Washers, Manley