Valve cover for high performance engines having integral oil passages

In an internal combustion engine having a plurality of rocker arm assemblies and valve stems with springs and a valve cover covering said rocker arm assemblies and valve stems with springs, the improvement comprising pressurized means for lubricating said rocker arm assemblies and valve stems with springs, said pressurized means comprising a manifold formed in said valve cover, openings communicating with the interior of said valve cover formed in said manifold, at least one of said opening for each rocker arm assembly and associated valve stem and spring, a reservoir for lubricant, supply and return conduits connecting the manifold to said reservoir, and pump means in the supply conduit for pressuring the lubricant flow to the openings, wherein lubricant under pressure is fed through each of said openings to an associated rocker arm assembly and valve stem and valve spring within the valve cover, including a jet body secured to the valve cover in each of said openings and extending through the manifold, the jet body having a transverse opening communicating with the lubricant in the manifold, and a longitudinal passage in the jet body having a jet orifice defined at one end, wherein lubricant, under pressure in the manifold, can enter the jet body via the transverse opening therein and the longitudinal passageway and be discharged from the jet orifice onto the associated rocker arm assembly and valve stem and valve spring under pressure.