AFR BBC magnum comp aluminum heads 305cc intake ports assembled with 2.250 Intake/ 1.880 Exhaust valves, 121cc CNC combustion chamber. Recommended for moderate street, or street/strip builds with displacements up to 509 cubic inches, operating up to 6500 RPM.
- Big Block Chevy Cylinder Head
- Magnum Comp
- Assembled
- 2.250 / 1.880 in Valves
- 305 cc Intake
- 121 cc Chamber
- 1.625 in Springs
- Aluminum
- 24 Degree Valve Angle
- Pair
| 305cc w/ 100% CNC Chamber Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .650 | |
| Int | 154 | 225 | 280 | 316 | 345 | 362 |
| Exh | 133 | 187 | 223 | 249 | 259 | 264 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.310", 3/4" radius plate exhaust, 2 1/8" curved pipe