This is the genuine, original equipment (OEM) stud that holds the head pipe to the bottom of the factory exhaust manifold. On 300ZX models, these install on the outlet of the driver's side exhaust manifold. Sold individually; three required per car. See Related Items for the head pipe nuts, sold separately.
Datsun 280Z, 280ZX, Nissan 300ZX
Datsun S30, S130, Nissan Z31
1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989