ARP Head Studs 11mm WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 260-4701

The ARP head studs (part number 260 - 4701) are a vital component for your Subaru WRX (2002 - 2014) or STI (2004 - 2021) turbo models. These are authentic ARP products, so beware of fakes! If you're planning to make 500whp or less, these head studs are perfect for you. ARP uses a premium 8740 alloy, which is much better than 'aircraft' quality. Each stud is vertically placed in special racks and precisely heat - treated to 200,000 psi. They feature a 12 - point style nut and are OE - 11mm sized, with a 4mm Allen head for threading into the block. ARP head studs are made with extremely precise tolerances, allowing gaskets and cylinder heads to easily glide into position and align perfectly. After heat - treatment, the studs are thread - rolled, giving them ten times better fatigue strength than pre - heat - treat threaded studs. Each kit also includes premium parallel ground washers. These head studs are a must for performance engines with increased boost and are the best in the market for your WRX or STI.

Using these ARP head studs is easy. First, make sure your engine is clean and ready for installation. Use the 4mm Allen tool to thread the studs into the block of your Subaru WRX or STI. Then, attach the 12 - point style nuts. Remember, these are for engines making 500whp or less. When installing, take your time to ensure the gaskets and cylinder heads glide into position easily. As for maintenance, keep an eye on the studs during regular engine check - ups. Look for any signs of wear or damage. If you notice anything wrong, replace the studs right away. And always use authentic ARP products to get the best performance and longevity for your engine.