GM 6.0L Stage 1

September 25, 2020 by  
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SKU: 86ec66ae9ed3 Category:


GM Factory 6.0 317
Our stage 1 cnc program is built using our latest valve job and port design for the 317 GM cylinder head castings. This version is designed to work with the stock 2.00-1.55 sized valves and is very popular with positive displacement blower or stroker customers who want an economical head that performs well while maintaining the factory 72cc combustion chambers.

Disassemble and clean
Fully CNC port Intake and exhaust runners and chamber partially
Competition multi angle valve job
Precision grind all 16 valves with backcut on intake valve
Hand blend valve job into porting
Flow test with sheet included
PCD Flat mill decks- additional milling optional
Custom Blueprint Assembly insuring all assembly heights and spring pressures are correct
TEA/PAC racing Dual .650″ spring kit with Titanium retainers

Lift Intake Exhaust
0.100 64.5 57
0.200 141 113.6
0.300 212 166.1
0.400 261 210
0.500 302 235
0.550 317 242
0.600 314 246
* Tests conducted at 28″ of water, 4.00″ bore, 1.875″ x 4.0″Exh. pipe

Customer will need to supply their cores

Oversize valves and optional springs are available

Give us a call at 330-634-2155
Send us an email at

Additional information

Weight 60 lbs


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