ARP 203-4701 Pro Series Undercut Head Stud Kit for 1986-1992 Supra 3.0L 7M-G

Vehicle Fitment

• 1986-1992 Toyota Supra (MK3) with 3.0 L 7M-GE (non-turbo) and 7M-GTE (turbo) inline-6 engines

Features

• ARP Pro Series head stud kit with undercut design
• Made of high-strength 8740 chromoly alloy
• Cold-forged and heat-treated to approximately 200,000 psi tensile strength
• Thread-rolled after heat treatment for exceptional fatigue resistance
• Centerless ground for precise alignment and gasket seating
• 12-point nut head style for easy access and torque application
• Black oxide finish to enhance corrosion resistance
• Includes hardened, parallel-ground washers for even load distribution

Specifications

• Material: 8740 chromoly alloy
• Tensile Strength: ~200,000 psi
• Head Style: 12-point; Finish: Black oxide
• Undercut stud design compensates for head gasket compression
• Washer: hardened, parallel-ground included
• Socket sizes: 14 mm 12-point and 5 mm Allen for removal

Included Components

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

Product Description

The ARP 203-4701 Pro Series Undercut Head Stud Kit is engineered specifically for the Toyota Supra MK3 (1986-1992) outfitted with the iconic 3.0 L 7M-GE (non-turbo) and 7M-GTE (turbo) inline-6 engines. Machined from 8740 chromoly alloy, each stud is cold-forged, heat-treated, and thread-rolled post-HT for exceptional strength and fatigue resistance (~200,000 psi). The undercut design helps equalize stretch between shorter and longer studs for consistent clamping force and improved gasket sealing - a critical feature when dealing with high-boost turbo applications or high-performance builds.

Centerless ground studs deliver precision alignment of the cylinder head and gasket, simplifying installation and ensuring optimal sealing. The kit includes 12-point nut heads and hardened washers that distribute load evenly. For added protection and longevity, studs feature a black oxide finish. Removal is straightforward using either a 14 mm 12-point socket or 5 mm Allen. Fitment is validated through 1992; **2025 coverage is unconfirmed at time of listing**. No known fitment exclusions within the specified years.