ARP Toyota 4AG 16V Head Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Toyota 4AG 16V Head Stud Kit for 1985-1989 Toyota MR2. Confirm the exact engine or vehicle application, thread size, length, material, strength series, included quantity, installation lubricant, tightening sequence, and current ARP torque specification before ordering.

Key Features

• Genuine ARP Fasteners: Built from 8740 chromoly steel rated at 200,000 psi tensile strength for extreme duty cycles.
• Versatile Application: Handles naturally aspirated street use up to 20 psi boosted track setups reliably.
• Fits standard 11mm stud diameter holes no modifications required.
• High-strength 8740 chromoly steel with rolled threads for 200,000 psi rating and superior fatigue resistance.
• Stud Configuration: Minimizes main block thread damage while providing repeatable torque accuracy across heat cycles.
• Compatible with OEM head bolts or ARP kit hardware exclusively.

Fitment

Specifications

What’s Included

One new ARP head stud & bolt kit in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARP

Automotive Racing Products manufactures high-performance studs, bolts, nuts, washers, wheel hardware, assembly tools, and installation lubricants for engine, drivetrain, chassis, and racing applications. Thread dimensions, material, preload method, lubricant, torque, and included quantity remain exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

Related Parts

• Shop all ARP products
• ARP Toyota 3 SGTE 2.0L DOHC 12 Pt. Head Stud Kit
• ARP Toyota 3SGTE CA625+ Head Stud Kit
• ARP Toyota 1600cc Main Bolt Kit (4A-GE Applications Only)

Frequently Asked Questions

How do I confirm the Toyota 4AG 16V Head Stud Kit fits my application?
Match the exact engine family or vehicle, component location, thread diameter and pitch, under-head length, material, strength series, and every current ARP application note.

Can I reuse the factory torque value with this ARP hardware?
Not automatically. Use ARP’s current instructions for the exact part, material, lubricant, tightening sequence, and preload method. Factory torque values may be based on different hardware and friction.

What is included with this ARP kit?
Only the studs, bolts, nuts, washers, lubricant, and tools expressly listed for this exact part number are included. Verify the required quantity before disassembly.

Installation Instructions

1. Confirm ARP part number 203-4203, the complete application, and every required supporting component before beginning work.
2. Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
3. Follow ARP’s current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
4. Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.