APR Head Stud Kit 11mm 2002-2014 WRX / 2004-2021 STI
Availability : 91 In stock
ARP Head Studs are a complete part of your engine rebuilding breakfast. These are the 11mm head studs, and these are a great idea if you are rebuilding your engine back to stock specs, or if you are building your car to climb Mount Everest. And here’s why:
These studs are constructed out of grade ARP2000 alloy that is rated far superior to “aircraft” quality. Then each stud is placed vertically in special racks and precisely heat-treated to 220,000 PSI. These studs are then rolled after the heat treatment, and this gives them about 1000% better fatigue resistance than your standard head studs.
Because of these reasons, many professional race teams of all motorsport's genres trust ARP head studs to keep their motors together whether it be the drag strip, road course, or rally.
- Made using premium grade alloy materials that deliver superior fatigue cycle life
- 11mm profile
- Each stud is placed vertically in special racks
- Heat treated to 220,000 psi
- Thread-rolled to provide 1000% better fatigue strength
- Resistance to atmospheric corrosion and oxidation
- Includes (12) head studs
- Includes (12) 12-point nuts
- Includes (12) washers