We O-ring all of our 6.0 Powerstroke heads because it virtually eliminates the head gasket issues these engines were plagued with from the factory. A receiver groove is machined into the deck surface of the heads and our USA made stainless wire is pressed into the groove - the wire protrudes from the groove applying extra pressure to all layers of the MLS gaskets - sealing combustion pressure in the cylinder. The high carbon stainless wire we use won’t compress or deform over time and is reusable should you have the heads off of the engine for any reason in the future. Our O-ringed heads work with any standard “off the shelf” head gaskets, and don’t require any special machining of the block - just prep the deck surface ensuring the block is clean, dry, and flat.
