Part #: 260 - 4704. If you aim to reach 500 - 675whp, these ARP head studs are your top choice! ARP uses premium 8740 chrome moly, better than 'aircraft' quality. Each stud is vertically placed in special racks and precisely heat - treated to 270,000 psi. They come with a 12 - point style nut, OE - 11mm size, and the stud head has a 4mm Allen for easy threading into the block. ARP studs are made with high precision, allowing gaskets and cylinder heads to fit perfectly. Thread - rolled after heat - treat, they have ten times better fatigue strength than common studs. Each kit also includes premium parallel ground washers. Ideal for performance engines with increased boost, they're the best in the market for your WRX or STI.
Using this ARP head stud kit is straightforward. First, use the 4mm Allen on the stud head to thread the studs into the block. Then, attach the 12 - point style nuts. When fitting the gaskets and cylinder heads, they should glide into place easily. As for maintenance, regularly check the tightness of the studs. If you notice any signs of wear or loosening, it's a good idea to replace the studs. Also, keep the studs clean to prevent dirt and debris from affecting their performance. Make sure to use the included premium parallel ground washers for the best results.
