86-87 GN / T-Type ARP Head Stud Kit 12 Point Nuts (Buick V6) 3.8 Liter
ARP cylinder head stud kits are precision centerless-ground and thread-rolled to Mil-S-8879 specs. Their black oxide finish protects them from wear and corrosion, and ARP throws in hardened parallel washers for uniform load distribution and accurate torque readings.