Rocker arms should be replaced any time an engine is rebuilt or when a new camshaft (stock or performance) is installed. Used rocker arms develop a wear pattern or angle which will exert itself right into your new cam. This set of 12 new L6 rocker arms is required for the warranty on new camshaft installations.
Factory style rocker arms are manufactured in multiple pieces, then assembled as a final step of construction. The cam lobe wipe pad is made separately from the arm. We have seen and tested several types of rocker arms over the years, and most aftermarket versions have come up short by comparison, especially when a one piece construction is used. There have even been cases where using the single-piece design has led to damaged valve train components. Whenever possible, we recommend using factory Nissan style rocker arms such as these as the minimum standard.
Datsun 240Z, 260Z, 280Z, 280ZX
Datsun S30, S130
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983