Pulsar Turbocharger PSR 3576 Gen2 .86 T3 Divided Inlet 3" V-Band Outlet Ball Bearing

ARP 203-4301 Custom Age 625+ Head Studs, Toyota Supra 2JZ-GTE JZA80 93-98

Brand: ARP

Part Number: ARP-203-4301

Country of Manufacture: United States
It's no accident that virtually every top professional engine builder relies on ARP Pro Series head studs for their competition engines. Simply stated, there's not a better stud system

on the market today. ARP uses a premium grade 8740 alloy and a proprietary ARP2000 alloy exclusively, far superior to "aircraft quality" alloy steels. Additionally, each stud is vertically
racked in special fixtures and precisely heat-treated to 190,000 psi for 8740 material and 220,000 psi for ARP2000 material. 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. Importantly, lesser quality studs are not even centerless ground; the material is roll threaded (usually before heat treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally slide right into place and are perfectly aligned—something that won't happen with inferior head studs.
The use of studs greatly simplifies cylinder head installation (especially on a race engine that has to be serviced frequently and quickly) as the head and gasket will be positively aligned.

Studs also provide more accurate and consistent torque loading. Here's why: When you use bolts to secure the head, the fastener is actually being "twisted" while it is being torqued. Accordingly, the bolt reacts to two different forces simultaneously. A stud should be installed in a "relaxed" mode; never forcefully tighten it using a jam nut. If everything is right, the stud should be installed hand tight. Then, when torquing the nut, the stud will stretch
only in the vertical axis. Remember that a shorter stud with necking down will have a similar stretch rate to a longer standard shank stud. This provides a more even clamping force across the head.

ARP® - Automotive Racing Products is a manufacturer of fasteners/bolts found in engines and drivelines from OEM replacement parts to specialty hardware for racing applications. ARP is a world leader in fastener technology. These range from high-performance, quality OEM replacement parts to specialty hardware for Formula 1, IndyCar, NASCAR, NHRA drag racing, and marine applications. To ensure optimum quality control, ARP has become exceptionally self-sufficient and now controls every facet of the manufacturing process. This is how ARP has managed to establish a reputation as a leading brand in the market.