ARP Nissan L20 12pt Head Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Nissan L20 12pt Head Stud Kit for 1977-1979 Nissan 200SX. 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: Forged 8740 chromoly studs with ARP2000 12-point nuts resist fatigue for repeated heat cycles.
• Matched Hardware: Includes hardened parallel washers for even load and simple bolt-on setup.
• Stud Design: Minimizes cylinder head block thread damage while allowing accurate torque verification.
• Precision-Rolled Threads: Provide maximum thread engagement and consistent torque values pass after pass.
• CNC-machined for exact fit and repeatable performance.
• Studs use 8740 chromoly steel heat-treated to ARP specs nuts are ARP2000 alloy with 12-point design for high torque capacity.

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 Nissan L20 Main Stud Kit
• ARP Nissan L20 Series 4cyl Rod Bolt Kit
• ARP Nissan 2.0L SR20DE/DET Flywheel Bolt Kit

Frequently Asked Questions

How do I confirm the Nissan L20 12pt 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 202-4201, 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.