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. The kits come complete with hardened washers and high-strength hex nuts.
2006-2015 NC MX-5 2.5L (SWAP)
Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 60 ft lbs with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.