ARP 203-4703 Pro Series Head Stud Kit for 1ZZ-FE/2ZR-FE 1.8L

Vehicle Fitment

• Toyota 1.8 L 1ZZ-FE, 2ZR-FE, 2ZR-FAE, 1ZR-FE, and 1ZR-FAE 4-cylinder engines

Features

• ARP Pro Series head stud kit designed for Toyota 1.8 L engine families
• Made from high-strength ARP2000 alloy
• Cold-forged, heat-treated to approximately 220,000 psi tensile strength
• Thread-rolled after heat treatment for maximum fatigue resistance
• Centerless-ground for superior concentricity and alignment
• Includes 12-point nuts and hardened, parallel-ground washers for even clamping
• Black oxide finish for enhanced corrosion resistance
• Features removable stud design - nuts can be used to pull studs out

Specifications

• Material: ARP2000 alloy
• Tensile strength: approx. 220,000 psi
• Head style: 12-point nut; Finish: black oxide
• Socket sizes: 12 mm 12-point and 4 mm Allen for removal

Included Components

• 10x ARP2000 head studs
• 10x 12-point nuts
• 10x hardened, parallel-ground washers

Product Description

The ARP 203-4703 Pro Series Head Stud Kit is precision-engineered for Toyota 1.8 L engines, including the 1ZZ-FE, 2ZR-FE, 2ZR-FAE, 1ZR-FE, and 1ZR-FAE variants. Utilizing premium ARP2000 alloy, each stud undergoes cold-forging, centerless grinding, and heat treatment before thread rolling - resulting in a tensile strength of approximately 220,000 psi, delivering outstanding strength and fatigue resistance.

Featuring a 12-point nut head and black oxide finish, installation is simplified and long-term corrosion resistance is ensured. Hardened, parallel-ground washers provide consistent load distribution, while the stud design allows for simplified removal via the included Allen socket feature. Fitment covers Toyota's 1.8 L engine series, but **2025 coverage is unconfirmed at time of listing**. Ideal for high-performance rebuilds or durable OEM replacement.