ARP 203-4702 Pro Series Undercut Head Stud Kit for 2JZ-A80 Supra (GTE/GE)

Vehicle Fitment

• 1993-1998 Toyota supra MKIV (2JZ-A80) with 3.0 L 2JZ-GE (non-turbo) and 2JZ-GTE (turbo) inline-6 engines

Features

• ARP Pro Series head stud kit with undercut design tailored for 2JZ-A80
• Constructed from premium 8740 chromoly alloy for high strength
• Cold-forged and heat-treated for maximum tensile integrity
• Thread-rolled post-heat treatment for superior fatigue resistance
• Centerless ground for precise alignment and gasket seal
• 12-point nut head style for easier installation torque access
• Black oxide finish provides enhanced corrosion protection
• Includes hardened, parallel-ground washers to ensure even load distribution

Specifications

• Material: 8740 chromoly alloy
• Tensile strength: approx. 200,000 psi
• Head style: 12-point nut; finish: black oxide
• Undercut design compensates for varying stud lengths and gasket compression
• Socket sizes: ½-in 12-point nut, plus 3/16-in Allen access for stud removal

Included Components

• 10x Pro Series undercut head studs
• 10x hardened, parallel-ground washers
• 10x 12-point nuts

Product Description

The ARP 203-4702 Pro Series Undercut Head Stud Kit is precision-engineered for Toyota Supra MKIV (2JZ-A80) equipped with either the naturally aspirated 2JZ-GE or turbocharged 2JZ-GTE inline-6 engines. Manufactured from high-strength 8740 chromoly alloy, each stud is cold-forged, heat-treated, thread-rolled, and centerless-ground to deliver exceptional strength (~200,000 psi) and fatigue resistance. The undercut design provides optimized clamping for consistent bolt stretch and gasket sealing across the head surface.

This performance-grade kit includes corrosion-resistant black oxide studs, 12-point nuts for secure torque application, and hardened washers for uniform load distribution. Installation and removal are facilitated by a ½-inch 12-point nut interface, with 3/16-inch Allen access integrated into the studs. Fitment is confirmed through 1998; **2025 coverage is unconfirmed at time of listing**. No known fitment exclusions within the specified years - ideal choice for performance rebuilds and high-boost applications.