Rocker shaft stud kit P/N 6009 is designed for Ford 390-428 FE engines using Edelbrock Performer RPM FE cylinder heads #60057, 60058, 60059, 60069, 60079, or 60089. This stud kit will provide better rocker shaft retention, ensuring full engagement of the fastener in the cylinder head while eliminating the possibility of bottoming the rocker shaft bolts in the cylinder head. The use of studs will eliminate any wearing of the threads in the cylinder heads as the rocker shaft assemblies are drawn down into position against the valve spring loads with the rocker shaft fasteners.
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