SDPC LS3 CNC Ported Cylinder Head, Assembled

Casting Number: 12595364 or 12582716
Valve Angle: 15-degree
Combustion Chamber: 70cc*
Intake Port Volume: 279cc*
Exhaust port Volume: 99cc*
Minimum Cylinder Bore Required: 4.000"

* Approximate, Numbers are within +/- 2ccs

Milling Information for Combustion Chamber Sizing:
- Approximately 0.006 per 1-cc
For 68-cc Chamber Remove 0.012
For 65-cc Chamber Remove 0.030

Specifications:
Max Lift: 0.660"
Locks: 7-degree
Retainers: Titanium
Valves: Hollow Stem Valves

Flow Chart:
Flowed @ 28 H20
Lift
0.100
0.200
0.300
0.400
0.500
0.600
0.650

Intake
70
153
225
280
324
350
358

Exhaust
52
118
180
201
217
230
236