AFR 1137/1138 SBC 245/70 OR 80CC .800 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Our largest and most powerful 60/40 head for the small block Chevy features 100% CNC machined intake runners, exhaust ports and combustion chambers. Capable of flowing 350 CFM at 0.800" of lift these heads come equipped with Titanium retainers and high quality components throughout, the 60/40 valve spacing which requires shaft mounted rocker arms for optimum valve train geometry and extra machining for 3/8" pushrod clearance. NPP stands for "no pushrod pinch." 245cc NPP Aluminum SBC Cylinder Heads Part # Exhaust Port Porting Finish Combustion Chamber 1137-TI Stock Competition 70cc 1138-TI Stock Competition 80cc 1139-TI Spread Port Competition 70cc 1140-TI Spread Port Competition 80cc Click part # to add product to your cart 245cc Race Head Flow Chart .200 .300 .400 .500 .550 .600 .650 .700 .800 Int 161 224 271 305 320 330 336 341 345 Exh 128 181 214 235 242 247 251 254 256 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe Included Components 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job 8mm Bead Lock Intake Valve, 2.125" x 5.000" Overall Valve Length 7253 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length 7254 PAC Racing Springs 1.550" OD Solid Roller Dual Valve Spring Pac #1225, 250 lbs on seat, .800" maximum lift, Max RPM 8000-8200 8001 10° Titanium Retainers 1.490" O.D x 1.115" I.D x .745" I.D 8505 10° Bead Lock Valve Keepers with lashcap recess 9009 Viton Valve Seals .600" O.D x .495" I.D 6612 Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D 8048 Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep 9060 Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep 9070 8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L 9051 Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads. Recommended Components: 1.5 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters) 6062 1.6 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters) 6063 1.6 T&D Shaft Mount w/ .550" off-set 6064 Intake Gasket 1.310 x 2.180 w/ 3/8" radius, Fel-Pro #1206 6820 Exhaust Port Gasket, Fel-Pro #1405 6835 Head Gasket, 350cid Fel-Pro #1004 6801 Head Gasket, 400cid Fel-Pro #1014 6802 SB Chevy Head Bolt Kit, ARP #134-3701 6310 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 6305 Head Bolt Washers, Manley 6320 Suggested Manifold AFR Titan TXR #4801 Suggested Manifold AFR Titan TXS #4802 Spark Plug Starting Range Autolite 3922 Specifications & Features: Material A356 Aluminum Intake Port Volume 245cc Intake Port Dimension 2.200" H x 1.300" W 7/16 Radius Intake Port Location Stock Exhaust Port Volume 80cc Exhaust Port Dimension 1.465" H x 1.570" W Exhaust Port Location .250" Raised Combustion Chamber Size 70cc or 80cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 23° Valve Spring Pocket Diameter 1.580" O.D Max Valve Spring Pocket Machining 1.680" O.D Warning: Do not machine spring pad any deeper. Deck Thickness .750" Minimum Bore Diameter 4.000" Flat Mill .006" per cc 65cc Maximum Angle Mill .009" per cc 60cc Maximum Note: Angle mills might require .120" Thick intake gasket. Minimum Cross Sectional Area 2.730 sq. in. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Carb EO# Non Emissions Compliant SHIPS IN THE LOWER 48 STATES FREE! CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER Warning: May cause cancer and reproductive harm.