Wiseco Engine Pistons, Mitsubishi Eclipse DSM 2.0l 4G63 6 Bolt 88-92 (86.00 mm) Size +1.0 mm Compression Ratio 8.3

Name: ARP 207-4206 Cylinder Head Studs for Mitsubishi Lancer EVO 10 2.0L (4B11) Turbo

Brand: ARP

Part Number: ARP-207-4206

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, which are substantially stronger than aircraft quality alloy steels. What’s more, each stud is placed vertically
in special fixtures and precisely heat-treated to 190,000 psi for the 8740 material and 220,000 psi for the ARP2000 material. This procedure ensures complete heat penetration, and the results are far superior to inferior quality studs from other manufacturers who simply dump parts in a basket and hope for the best. Importantly, lesser-quality studs are not even centerless ground; the material is threaded in bar stock form (usually before heat treatment, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you’ll note that gaskets and cylinder heads literally glide into place and are perfectly aligned—something that doesn’t happen with inferior quality head studs.
The use of studs greatly facilitates cylinder head assembly (especially on a competition engine, which must be serviced frequently and quickly), as the cylinder head and gasket are correctly aligned.

Studs also provide a more accurate and consistent torque loading. Here's why: when you use bolts to secure the head, the fastener "twists" as it is tightened to the proper torque. Thus, the bolt reacts to two different forces simultaneously. A stud must be installed without being over-tightened; never tighten it tightly using a jammed nut. If everything is correct, the stud should be installed by hand. Then, when torquing the nut, the stud will stretch
only on the vertical axis. Remember that a shorter stud with a recess will have a similar stretch rate to a longer standard shank stud. This provides more uniform clamping force on the head.

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