AFR 24° BBC 335cc Enforcer As Cast 122cc Chambers

The AFR 335cc BBC Enforcer Cylinder Head is engineered with Permanent Mold "As-Cast" Technology for precision and repeatability in port location and performance. Designed for budget-conscious racers, these heads are ideal for 509 to 540 cubic inch engines operating below 6500 RPM. They come fully assembled with high-performance components identical to AFR's CNC-ported cylinder heads, including ARP rocker studs, PAC Racing springs, Viton valve seals, AFR adjustable guide plates, hardened spring seats, and one-piece 8mm 21-4N stainless steel valves. Available as a bare head for DIY enthusiasts.

Sold individually—two required per engine.

Included Components

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” max lift, 6500-6700 RPM) - AFR #8002
10º Steel Retainers (1.500” OD x 1.120” ID x .705” ID) - 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 #6405
3/8” Guide Plates - AFR #6110
11/32" Viton Valve Seals - AFR #6613
Hardened Valve Spring I.D Locator (1.550” OD x .705” ID) - AFR #8048

335cc BBC Enforcer Flow Chart

Lift	.200	.300	.400	.500	.600	.700
Intake	140	207	265	296	336	355
Exhaust	119	172	211	239	249	255

Test conducted at 28" of water (pressure) on Superflow 1020, Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe.

Specifications & Features

Material: A356 Aluminum
Intake Port Volume: 335cc
Intake Port Dimension: 2.510"H x 1.820"W x 3/8" Radius
Exhaust Port Volume: 140cc
Exhaust Port Dimension: 1.690"H x 1.900" W
Combustion Chamber Size: 122cc
Valve Angle: 24°/4° Int, 15°/4° Exh
Deck Thickness: 0.45"
Minimum Bore Diameter: 4.25"
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat

Legal Notice

WARNING: These products are illegal for operation on any public highway, including paved and unpaved roadways, or in public parks. Legal use is restricted to dedicated racing vehicles only. Violations may result in fines up to $37,500 per vehicle, revocation of DMV registration, and proof of correction of tampering.