Pro Series ARP Head Stud kit fits 2011 to 2012 Coyote 5.0L engines with 12mm Head Studs. ARP 2000 Alloy head stud kits are a perfect upgrade to the factory TTY bolts. These are the premium material studs for use in VERY high boost and cylinder pressure applications. These studs provide even clamping and loading without stretch and can be retorqued over and over. Kit is complete with 12 point nuts and washers.
