ARP Jeep 4.0L Inline 6 Cyl Main Stud Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Jeep 4.0L Inline 6 Cyl Main Stud Kit. 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 Steel: Forged studs with 220000 psi tensile strength and 135000 psi yield strength resist fatigue and stretching for long-term engine reliability.
• Black Oxide Finish: Provides corrosion resistance and reduces galling during installation on aluminum blocks.
• Exact OEM Dimensions: M11 x 1.5mm main studs match factory locations for drop-in replacement without block modifications.
• High Clamp Load: Supports 1000+ horsepower builds while maintaining main bearing alignment and oil clearance.
• 12-Point Nuts and Hardened Washers: Included precision components allow accurate torquing and prevent loosening under vibration and heat cycles.
• Kit includes 12 main studs 12 twelve-point nuts and 12 parallel ground washers.

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 03 Mazda 2.3L DOHC 16V Main Stud Kit
• ARP 03-06 Mitsubishi Evo Main Stud Kit
• ARP 06+ Chevy Duramax Diesel LBZ/LMM Main Stud Kit

Frequently Asked Questions

How do I confirm the Jeep 4.0L Inline 6 Cyl 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 146-5401, 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.