AFR LS3 Heads 260cc mongoose assembled cylinder heads with an 69cc combustion chamber and 2.165 intake/ 1.600 exhaust valves, They’re designed for 4.000 or larger bore applications up to 454 CI, operating up to 7000 RPM.
- GM LS3/LS99 Cylinder Heads
- LS3 Mongoose
- Assembled
- 2.165 / 1.600 in Valves
- 260 cc Intake
- 69 cc Chamber
- 1.270 in Springs
- 6 Bolt
- CNC Ported
- 12 Degree Valve Angle
- Aluminum
- Pair
| 260cc Large Bore Competition Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .650 | .700 | |
| Int | 159 | 234 | 293 | 336 | 366 | 377 | 384 |
| Exh | 112 | 158 | 207 | 235 | 248 | 251 | 255 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe