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AFR 24°BBC 300cc Oval Port Fully CNC Ported,112cc Chambers, Competition Package, Assembled w/ 1.550 OD Pacaloy Solid Roller Springs
AFR 24°BBC 300cc Oval Port Fully CNC Ported,112cc Chambers, Competition Package, Assembled w/ 1.550 OD Pacaloy Solid Roller Springs
AFR 24°BBC 300cc Oval Port Fully CNC Ported,112cc Chambers, Competition Package, Assembled w/ 1.550 OD Pacaloy Solid Roller Springs
AFR 24°BBC 300cc Oval Port Fully CNC Ported,112cc Chambers, Competition Package, Assembled w/ 1.550 OD Pacaloy Solid Roller Springs

AFR 24°BBC 300cc Oval Port Fully CNC Ported,112cc Chambers, Competition Package, Assembled w/ 1.550 OD Pacaloy Solid Roller Springs

Original price was: $4,336.50.Current price is: $4,249.77.

AFR 24° BBC 300cc Oval Port Fully CNC Ported, 112cc Chambers, Competition Package The AFR 300cc BBC Oval Port Cylinder Head is designed for aggressive street, street/strip, or race big block Chevys with displacements…

SKU: AFR-3680 Categories: , Brand:

Description

AFR 24° BBC 300cc Oval Port Fully CNC Ported, 112cc Chambers, Competition Package

The AFR 300cc BBC Oval Port Cylinder Head is designed for aggressive street, street/strip, or race big block Chevys with displacements up to 540 cubic inches, operating at or below 6800 RPM. Featuring 100% CNC-machined intake runners, exhaust ports, and combustion chambers, this head delivers superior airflow with 388 CFM at 0.700″ lift. It’s the ultimate performance upgrade without transitioning to a rectangular port design.

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, 2.300″ x 5.500″ O.A.L (AFR #7626)
  • 11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450″ O.A.L (AFR #7630)
  • PAC Racing Spring #1224 1.625 O.D. Solid Roller Dual Valve Spring, 275lbs on seat, .850″ Maximum Lift (AFR #8031)
  • PAC Racing #1940 1.550″ OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725″ Maximum Lift (AFR #8002)
  • 10° Steel Retainers (AFR #8518, AFR #8511)
  • 10° 11/32″ Valve Keepers with Lashcap Recess (AFR #9005)
  • ARP 7/16″ Rocker Studs Intake (AFR #6407) & Exhaust (AFR #6406)
  • Adjustable 3/8″ Guide Plates (AFR #6109)
  • 11/32″ Viton Valve Seals (AFR #6613)
  • Hardened Spring Cup 1.740” O.D / 1.650” I.D (AFR #8046)
  • Intake & Exhaust Valve Seats (AFR #9065, AFR #9064)
  • 11/32″ Bronze Valve Guides (AFR #9041, AFR #9042)

Performance Flow Chart

Test conducted at 28″ of water on Superflow 1020 with a 4.500″ bore size, 3/4″ radius plate exhaust, and 1 7/8″ curved pipe.

Lift (in.) .200 .300 .400 .500 .550 .600 .650 .700
Intake (CFM) 161 238 298 342 359 374 384 388
Exhaust (CFM) 139 191 234 266 275 289 294 298

Specifications & Features

  • Material: A356 Aluminum
  • Intake Port Volume: 300cc
  • Combustion Chamber Size: 112cc
  • Valve Angle: 24°/4° Int, 15°/4° Exh
  • Deck Thickness: .750″
  • Minimum Bore Diameter: 4.250″
  • Flat Mill: .006″ per cc (Max 102cc)
  • Angle Mill: .009″ per cc (Max 97cc, may require .120″ intake gasket)
  • Spark Plug: 14mm x .750″ w/Gasket Seat
  • CARB Status: Not legal for sale or use on emission-controlled vehicles. For race use only.

Additional information

Weight 1504 oz

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