These heads are a direct replacement for your tired and cracked 6.0l heads. New casting, brand new valves, seals and springs. So if you are going cab up why not go back with new instead of old questionable junk. These heads include machined O-Ring. The O-Ring is designed to keep the compression in the cylinder not in your cooling system.
Do Not Use Fel-Pro Gasket with O-Ringed Head it will not work.
No Core required.
Ready to install with injector cups already pressed in.
Heads are guaranteed for 1 year from the date of purchase.
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