Selling my 2003 LQ4 heads off my 6.0L. These heads are in great condition. Heads have been milled .020. They have LS6 valves,springs, retainers, and rockers. The LQ4 heads are great for turbo or supercharger setups and will support up to a .600 lift cam with these LS6 springs. They flow good and yield low compression. Here are the specs and pictures:


These are stock specs:
Casting Number 317
Head: 2001+ LQ4 6.0 Liter Truck
Material: Aluminum
Part Number: 12572035
Combustion Chamber Volume: 71.06cc
Compression Ratio: 10:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

$275