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

The 260 - 4701 ARP head studs are a vital part for your Subaru build. They're authentic ARP products, so watch out for fakes! These studs fit Subaru WRX from 2002 to 2014 and STi from 2004 to 2021. If you're aiming for 500whp or less, they're perfect for you. ARP uses a high - grade 8740 alloy, better than 'aircraft' quality. Each stud is heat - treated to 200,000 psi. They come with a 12 - point style nut and are OE - 11mm sized, with a 4mm Allen head for easy threading. ARP studs are made with high precision, allowing gaskets and cylinder heads to fit smoothly and align perfectly. They're thread - rolled after heat - treat, giving them ten times better fatigue strength. Each kit also includes premium parallel ground washers. These head studs are a must for performance engines with increased boost and are the best on the market for your WRX or STI.

Using these ARP head studs is easy. First, make sure your engine is clean and free of debris. Use the 4mm Allen head on the stud to thread it into the block. Then, attach the 12 - point style nut. When installing, ensure the gaskets and cylinder heads fit well, as these studs are precision - made for smooth alignment. Note that these are authentic ARP products, so avoid using fakes. For maintenance, regularly check the tightness of the studs, especially after long - term use or high - performance driving. Keep them clean to prevent corrosion. If you notice any signs of wear or damage, replace the studs immediately. With proper use and maintenance, these head studs will serve your Subaru WRX or STI well for a long time.