ARP 625+ Custom Age Headstuds for 2.0/2.3L Ecoboost Engines (Focus ST, Focus RS, Ecoboost Mustang)
These studs have an even higher UTS (closer to the 280 ksi limit of the material) than the previous L19 offering and have the added benefit of better corrosion resistance. We also upgraded the nuts in this head stud package to a heat treated version which have a lower failure rate when paired with an equally heat treated stud. The best part about the new 625+ studs is that we are able to keep the price the same. Many other platforms charge a premium for this material but we believe the price should stay the same even for a better product.
Our 10mm head stud kit comes with upgraded nuts and washers along with a special assembly lube that has been tested to provide the most accurate torque spec of any lube on the market.