Phuzion Head Gasket
The Cometic Phuzion Head Gasket is the next stage in head gasket
development from Cometic Gasket. Comprised of a Cometic
MLS head gasket and multiple Garlock Helicoflex gas
filled o-rings. By combining the two technologies a superior
combustion seal is created without machining any grooves in your
block and/or head.
The gas filled o-ring portion of Phuzion is manufactured from
high strength aerospace tubing capable of withstanding ultra high
combustion temperatures and pressures. Additionally each ring is
plated with silver to increase the sealing level and minimize
brinelling. The silver also aids in withstanding head to block
movements without burnishing the surfaces. The real innovation to
the gas filled o-ring though, is the gas itself. During the
manufacturing process the gas in the ring is sealed in at 500-600
psi at room temperature. As the engine is warmed up, the gas is
heated increasing the pressure inside the ring causing it to
expand. This allows the ring to seal the combustion even in the
event of head liftoff.
The MLS gasket portion of Phuzion is what gives you
the ability to use the gas filled o-rings without machining any
grooves in your block and/or head. MLS head gaskets
are comprised of three layers. Viton coated embossed spring steel
outer layers and a steel inner layer, which provides support and
thickness to the gasket. Embossments on the MLS gasket
allow for proper seal around oil and water passages.
Head and Deck surfaces should be within .002 of flatness and have a
surface finish of 50RA or finer. The compressed operating thickness
of Phuzion is .051.