ARP Audi 5cyl Main Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Audi 5cyl Main Stud Kit for 1989-1991 Audi 100. 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

• ARP2000 Alloy Construction: Forged from high-tensile strength steel rated at 220,000 psi for reliable performance under extreme stress.
• Complete Kit Contents: 12 M10x1.5x178mm studs, 10 M10x1.5x195mm studs, 22 hardened washers, 22 steel 12-point nuts.
• Rolled Threads: Increases fatigue resistance by up to 700% over cut threads found in stock hardware.
• Black Oxide Finish: Protects against corrosion and galling during repeated installations.
• Precise Dimensions: Direct replacement for OEM mains with lengths matched to Audi 5cyl block design.
• Made from ARP2000 alloy steel with rolled threads and black oxide coating for strength and rust protection.

Fitment

Specifications

What’s Included

One new ARP main 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 VW/Audi 5 Cylinder 20V 12PT Head Stud Kit
• ARP 95-01 Audi 2.8L Non Turbo / 00-05 Audi 2.7L Rod Bolt Kit
• ARP 03 Mazda 2.3L DOHC 16V Main Stud Kit

Frequently Asked Questions

How do I confirm the Audi 5cyl Main 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 204-5404, 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.