ARP Honda/Acura K20A (A2 & A3) Head Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Honda/Acura K20A (A2 & A3) Head Stud Kit for 2002-2006 Acura RSX. 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

• Application-Specific Sizing: Exact fit for K20A2/A3 with M11x1.5 studs at 233mm length for mains and 192mm for outers.
• ARP2000 Alloy Construction: High-strength material resists fatigue and maintains clamp load through repeated heat cycles.
• 12-Point Nuts: Included hardened-steel nuts with wide base for secure wrench hold and even load distribution.
• Yes, ARP 208-4701 includes 8 main studs at 233mm and 2 outer studs at 192mm for precise fit on RSX Type-S (K20A2) and RSX Base (K20A3).
• Stud Design: Minimizes cylinder block thread damage compared to bolts and allows accurate torque values.
• Precision-Rolled Threads: Increases thread engagement by 25% over cut threads for consistent torquing.

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 80-00 Honda M12x1.85 inch 5 Wheel Stud Kit
• ARP 80-00 Honda M12x1.85inch Wheel Stud Kit (4 Studs/1 Wheel)
• ARP 80-00 Honda M12x2.85inch 4 Wheel Stud Kit

Frequently Asked Questions

How do I confirm the Honda/Acura K20A (A2 & A3) 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 208-4701, 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.