ARP 2307004 Oil Pump Stud Kit, 12-Point Style, For Select Chevrolet V8 Applications Premium grade oil pump fasteners are inexpensive "insurance" that could save your engine Manufactured from black oxide finished chrome moly steel Rated at 170,000 PSI, which is considerably stronger than Grade 8 hardware Kit comes complete with studs, washers, and nuts Nuts are compact 12-point style