AFR 24° BBC Cylinder Head 290cc Oval Port Fully CNC Ported, 112cc Chambers, Competition Package, Assembled w/Solid Roller Springs

AFR 24° BBC Cylinder Head 290cc Oval Port Fully CNC Ported, 112cc Chambers, Competition Package, Assembled w/Solid Roller Springs

The AFR 290cc BBC Oval Port Cylinder Head is the perfect solution for moderate street or street/strip big block Chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. Featuring 100% CNC-machined intake runners, exhaust ports, and combustion chambers, this head is capable of flowing an impressive 375 CFM at 0.700″ of lift.

Included Components

• 100% CNC Ported Combustion Chambers
• 100% CNC Ported Exhaust Ports
• 100% CNC Ported Intake Ports
• Competition 5-Angle Valve Job
• 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 Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 220 lbs. on seat, .710” max lift (AFR #8000)
• PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” max lift (AFR #8002)
• 10° Steel Retainers 1.500″ O.D x 1.120″I.D x .705″ I.D (AFR #8511)
• 10° 11/32″ Valve Keepers with Lashcap Recess (AFR #9005)
• ARP 7/16″ Rocker Studs Intake (AFR #6407)
• ARP 7/16″ Rocker Studs Exhaust (AFR #6406)
• Adjustable 3/8″ Guide Plates (AFR #6109)
• 11/32″ Viton Valve Seals (AFR #6613)
• Hardened Valve Spring I.D Locator 1.550″ O.D x .705″ I.D – For 8000 Spring (AFR #8048)
• Hardened Valve Spring I.D Locator 1.655″ O.D x 1.565″ I.D – For 8002 Spring (AFR #8044)
• Intake Valve Seats 2.450″ O.D x 1.950″ I.D x .375″ Deep (AFR #9065)
• Exhaust Valve Seats 2.000″ O.D x 1.580″ I.D x .375″ Deep (AFR #9064)
• 11/32″ Intake Bronze Valve Guides .502″ O.D x 2.10″ O.A.L (AFR #9041)
• 11/32″ Exhaust Bronze Valve Guides .502″ O.D x 2.25″ O.A.L (AFR #9042)

290cc Competition Flow Chart

Test conducted at 28″ of water (pressure) on Superflow 1020. Bore Size: 4.310″, intake 3/4″ radius plate exhaust, 1 7/8″ curved pipe.

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 290cc
• Combustion Chamber Size: 112cc
• Valve Angle: 24°/4° Int, 15°/4° Exh
• Deck Thickness: .750″

Note: This product is not legal for sale or use on emission-controlled vehicles and is intended for dedicated race vehicles only.