The ultimate bang for the buck for the customer 
who already owns LS-6 heads and wants to keep his
stock sodium filled valves.
Package includes:
Fully CNC port Intake,exhaust, and combustion chambers
Competition multi angle valve job
By reusing stock 2.00" intake and 1.55"exhaust valves 
valvetrain weight is kept at the very minimum yet 
flow is outstanding.
Heads come assembled with Comp cams #26918-16 springs,Gm locks,
retainers,seals, and spring seats.
Flow intake and exhaust (flow sheet included)
Check all 16 spring height's, set pressures and assemble.
Mill heads to customers specs to reduce cc's