Afr Chevy 335cc Enforcer As-Cast Bbc Cylinder Head, 122cc Chambers, Assembled

AFR's 335cc BBC Enforcer Cylinder head features their Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allow for extremely accurate and repeatable port location/performance. This budget-friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM. Sold as a single piece, 2 pieces required per engine. 122cc combustion chambers.
The all-new BBC 335cc Enforcer cylinder head features its 2.250" intake valves, 1.880" exhaust valves and come equipped with their 8002 hydraulic roller valve springs. This combination will support a 0.725" lift camshaft and up to 6,700 RPM. They come fully assembled with the identical components found in their higher-end CNC ported cylinder head; such as ARP rockers studs, PAC Racing Springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) their one-piece 8mm 21 4N Stainless Steel valves.  Sold as a single piece, 2 pieces required per engine.   335cc BBC Enforcer Flow Chart   .200 .300 .400 .500 .600 .700 Int 140 207 265 296 336 355 Exh 119 172 211 239 249 255 Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe Basic Package Components Part # 3-angle Valve Job
As Cast Combustion Chambers
As Cast Exhaust Ports
As Cast Intake Ports   11/32" Intake Valve, 2.250" x 5.500" O.A.L AFR #7620 11/32” Nail Head Exhaust Valve, 1.880” x 5.450” O.A.L. AFR #7630 PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 AFR #8002 10º Manley Steel Retainers 1.500” O.D x 1.120” I.D x .705” I.D AFR #8511 10° 11/32" Valve Locks with lashcap recess AFR #9005 ARP 7/16" Rocker Exhaust Studs AFR #6406 ARP 7/16" Rocker Intake Studs AFR #6407 3/8” Guide Plates AFR #6110 11/32" Viton Valve Seals AFR #6613 Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D AFR #8048
Specifications, Features, and Optional Supporting Components Head Material A356 Aluminum Intake Port Volume 335cc Intake Port Dimension 2.510"H x 1.820"W x 3/8" Radius Intake Port Location Stock Exhaust Port Volume 140cc Exhaust Port Dimension 1.690"H x 1.900" W Exhaust Port Location Raised .375" Combustion Chamber Size 122cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 24°/4° Int, 15°/4° Exh Valve Spring Pocket Diameter 1.750" Max Valve Spring Pocket Machining 1.750" Warning::Do not machine spring pad any deeper.   Deck Thickness 0.45"" Minimum Bore Diameter 4.25"
Intake Port Gasket AFR #6856 Exhaust Port Gasket AFR #6856 Head Gasket, Fel-Pro #1047 (Gen V and VI) AFR #6849 Head Gasket, Fel-Pro #1017-1 (Gen IV) AFR #6850 Head Bolts, ARP 135-3703 (Gen IV) AFR #6306 Head Bolts, ARP 135-3707 (Gen V) AFR #6308 Head Studs, ARP 235-4713 AFR #6307 Head Bolt Washers, Manley AFR #6320 Suggested Manifold Victor Jr or Super Victor Flat Mill .006" per cc/ Maximum 105cc As Cast Angle Mill .009" per cc/Maximum 100cc As Cast Spark Plug Starting Range Autolite 3924 Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. .