ARP's Differential Cover Bolts are nominally rated at 180,000 psi and much stronger than stock (or even Grade 8) hardware. These bolts have rolled threads for secure engagement and are resistant to rust and corrosion. The Bolts offer a lustrous contrast to a painted OEM cover or perfectly compliment a chrome plated aftermarket version, enhancing the appearance of any GM 10 or 12-bolt rear end setup.