Small Port, High Velocity, Torque Monster!
Want to wake up the Big Block in your favorite tow vehicle? AFR's 265cc high velocity oval port is just the ticket! They are also ideal on smaller cubic inch street performance applications (396-468 CID), providing “gobs” of bottom end torque, tremendous throttle response, and great all around power. With AFR’s trademark 3/4” deck, reinforced rockerstud bosses, and thick rugged castings, you can own the strongest and most efficient heads on the market today. Premium hardware packages include 2.19/1.880 one piece stainless valves, 1.550 double springs, 10 degree locks and retainers, and high quality studs and guideplates as standard equipment. Take note the higher flowing exhaust ports are raised .375 over stock location, and therefore these heads might not be a direct bolt-on in every application. These heads have no EGR and are not emissions legal.

Note:
Optional stud girdle required for 2° rolled valve angles and 1” longer head bolts needed on four bottom exhaust bolt holes.

Basic Package Components	Part #
40% CNC Ported Exhaust Ports (Bowl Blend) 80% CNC Ported Intake Ports (Bowl Blend & Gasket Port Match) 3-angle Valve Job/Radiused Exhaust
Intake Valve, 2.190" stainless steel	AFR #7601
Exhaust Valve, 1.880" stainless steel	AFR #7630
1.550 O.D. Hydraulic Dual Valve Spring w/ dampener 170 lbs. on seat, 430 lb open	AFR #8002
1.625 O.D. Solid Roller PAC Racing Spring, 275lbs on seat, .850 Maximum Lift	AFR #8031
10° Chrome Moly Retainer	AFR #8511
10° Valve Locks	AFR #9005
Guide Plates	AFR #6109
Viton Valve Seals	AFR #6611
Hardened Spring Cup	AFR #8045
Intake Valve Seats	AFR #9065
Exhaust Valve Seats	AFR #9064
AFR BB Chevy 7/16 Exhaust Studs	AFR #6406
AFR BB Chevy 7/16 Intake Studs	AFR #6407

Specifications, Features, and Optional Supporting Components

Head Torque	75 ft. lbs
Intake Port Gasket	GM #12366985
Head Gasket, 4.370 bore, Fel-Pro #1027	AFR #6851
Head Gasket, 4.540 bore, Fel-Pro #1017	AFR #6850
Head Studs	AFR #6307
Head Bolts	AFR #6308
Head Bolt Washers	AFR #6320
Stud Girdle	AFR #6210
Suggested Manifold	RPM Performer Victor Jr.,
Suggested Manifold	Wieand Stealth
Spark Plug Starting Range	Autolite 3935
Combustion Chambers	107cc As Cast, 112cc with CNC Chambers
Spring Pocket	Can be cut to 1.750, no deeper
Valve Spacing	Standard
Rocker Arms	Standard
Valve Angle	24°/4° Intake, 15°/4° Exhaust
Angle Mill (Milling options available) 97cc max	.009" per cc
Flat Mill (Milling options available) 102cc max	.006" per cc

Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers. Angle mills might require a .120 thick intake gasket.