The 625+ Head Stud Kit will secure the heads to a built engine in the Subaru WRX/STI.
ARP Custom Age 625+ Head Stud Kit
Head Stud Specs:
Made using newly formulated super-alloy demonstrates superior fatigue cycle life
High tensile strength and toughness of 260,000-280,000 psi
Resistance to atmospheric corrosion and oxidation
Includes (12) head studs
Includes (12) nuts
Includes (12) washers
Ideal for those with fresh, or high-horsepower rebuilds
ARP 625+ Head Stud Kit
ARP hands down engineers and manufactures the best hardware in the automotive industry. From world-class race cars to the world's fastest street cars, more than likely they will have some form of ARP hardware.
The 625+ Head Stud Kit has been designed to sustain the pressure of a high-horsepower build while securing the heads to the block without skipping a beat. If you are building your motor to handle more boost and more power, ARP Head Studs are almost mandatory in terms of being one of the vital ingredients to a proper engine build.