Allstar 3/8 inch-24 Thread 2.375 inch Length Engine Rocker Arm Stud (Pack of 8) features rocker arm studs that are designed to fit small block Chevy applications. The studs are made from high-quality grade 8 material. They have 3/8-24 threads and require a 7/16-14 tapped hole in the cylinder head. The studs have a 2.375 inch overall length. It is backed by a 90-day limited factory warranty. It is sold as one set of 8 pieces.