ARP Ford 03 Duratec 2.3L Head Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Ford 03 Duratec 2.3L Head Stud Kit for 2003-2004 Ford Focus. 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

• 8740 Chromoly Steel: Heat-treated to 200,000 psi tensile strength resists fatigue in high-stress environments.
• Rolled Threads: Increases engagement depth by 25-30 percent for consistent fastening under load.
• Constructed from 8740 chromoly steel, induction hardened and stress-relieved to ARP’s 200,000 psi rating for superior holding power.
• Stud Design: Minimizes block thread damage and ensures accurate torque retention over multiple heat cycles.
• Precision machining and thread rolling for flawless fit and load distribution.
• Lubricate with ARP Ultra-Torque for precise torque values and gasket sealing.

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 Ford Zetec 2.0L Head Stud Kit
• ARP 98+ Ford 2.0L Zetec Main Stud Kit
• ARP Ford Zetec 2.0L M11 Flywheel Bolt Kit

Frequently Asked Questions

How do I confirm the Ford 03 Duratec 2.3L 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 151-4204, 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.