ARP 4G63 Main Stud Kit


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ARP 4G63 Main Studs

Automotive Racing Products (ARP) are the leading brand in fastener technology. All fasteners are made with the highest quality materials with quality assurance testing.

ARP manufactures fasteners from a wide assortment of materials ranging from popular stainless steel and 8740 chrome moly to exotic alloys that have been developed to handle space travel.

ARP 4G63 Main Stud Kits

ARP 4G63 Main Studs are available in premium grade 8740 chrome moly or Custom L19, and includes hardened parallel washers for an even load distribution and accurate torque readings.

8740 Chrome Moly: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now, 8470 is viewed as a moderate strength, good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard practice in the manufacturing of this kit. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.

Custom L19: This is a premium steel that is processed to deliver superior strength and fatigue properties. L19 is a very high strength material compared to 8740 and ARP2000 and is capable of delivering a clamp load at 260,000 psi. It is primarily used in short track and drag racing applications where inertia loads exceed the clamping capability of ARP2000. Like most high strength, quench and temper steels – L19 requires special care during manufacturing to avoid hydrogen embrittlement. This material is easily contaminated and subject to stress corrosion. It must be kept well-oiled and not exposed to moisture. Note: this kit is a custom kit, and does not include a torque specification sheet. Recommended to torque to 72 ft-lbs.

Please note: Lead times may apply on Custom L19 kits.

Socket Size: 12mm 12pt, 4mm Allen

ARP 4G63 Main Studs Suit: Mitsubishi 2.0L 4G63 4-Cylinder (Mitsubishi Evo V – IX)

ARP 4G63 Main Stud Part Number: 207-5401 (8740) & CUSTOM-4GL19MSK (Custom L19)

At Street Race Solutions, we utilise ARP Main Studs in all of our engine builds. If you have any question relating to fasteners, please call us on 07 4602 3858!


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