Z camshafts are sensitive to valve spring pressure. Overly stiff valve springs can cause cam lobe damage. Motorsport valve springs are properly designed for increased performance at the right pressure. Our kit includes 12 chrome silicon double valve springs, and 12 chrome-moly retainers, which are more durable than the aluminum type. For use with performance cams only.
Datsun 240Z, 260Z, 280Z, 280ZX
Datsun S30, S130
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983