P2R Power Rev Racing. ARP uses premium grade 8740 alloy that is heat treated to 200,000 p. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best. Following heat treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. ARP studs are thread rolled after heat treat which gives them about 1000% better fatigue strength than studs that are threaded prior to heat treat (a very common industry practice). It costs more to do it this way because it’s tough on tooling but the results are well worth the extra effort. Application : Honda Prelude/Accord H22A1 & H22A4 Engines. Orders must be placed by 12pm EST Monday – Friday to start processing on the same day. Orders placed on Saturday or Sunday will not be processed until the following Monday. HPTautosport strives to be your #1 source for aftermarket performance parts and service. With over 20+ years of experience in the automotive industry and a lifelong passion for motor sports, we have the knowledge and expertise to assist you with every aspect of your vehicle. Unlike our competitors, we not only sell parts but we install these parts daily in our full service performance facility in Arden, North Carolina. Our mission here at HPTautosport is to gain your business by offering top quality products and great service at affordable prices. If there is a problem with your order, we contact you right away. We want you to be happy with our products and services, so we always go the extra mile to make sure you keep coming back for years to come. Check out our store today!