ARP Main stud kit For Nissan RB30 Notes: ARP Main stud kit suit Nissan RB30 These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide finish for corrosion resistance. Experience the ultimate in strength and durability with our ARP Main stud kit for Nissan RB30! Made from high-quality chromoly steel and boasting a 190,000 psi tensile-strength rating, these main studs are built to last. Expertly designed to meet Mil-S-8879 specs, they also feature a black oxide finish for added corrosion resistance. Upgrade your Nissan RB30 engine with confidence and get ready for peak performance!