Originally Posted by Blownfogger540

these come not as shown with light weight valves and Z06 springs

but with SS valves and the blue Z06 springs same as yellow ones
$1200

and are 68cc

Manley nextek polished springs and Ti retainers good to .700" lift plus ADD $300.00
these are not shity patriot springs so dont compare coal to diamonds

$1500

SDPC CNC 821 castings smooth chambers

Valve Angle: 15-degree
Combustion Chamber: 70cc*
Intake Port Volume: 275cc*
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: 0.570"
V/Springs: Stock LS3/LS6
Locks: 7-degree
Retainers: Stock

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

Originally Posted by Bob800

Has anyone used these on an LS2 and dyno'd? I'm interested in what type of HP gain there is on an LS2.
Bob