Sold out
Click to zoom in
SKU: 146-5401 | UPC: 672036041908
ARP Jeep 4.0L Inline 6 Cylinder Main Stud Kit 1987-2006
This ARP main stud kit replaces weak factory bolts in Jeep 4.0L inline 6 cylinder engines for secure crankshaft main bearing caps. It fits 1987-2006 Jeep Cherokee Wrangler Grand Cherokee Comanche Wagoneer and Grand Wagoneer models with the 4.0L engine. ARP2000 alloy construction handles extreme cylinder pressures in high-performance and boosted applications delivering dependable clamping force.
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
- 12-Point Nuts and Hardened Washers: Included precision components allow accurate torquing and prevent loosening under vibration and heat cycles
- 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
Product Notes
- Kit includes 12 main studs 12 twelve-point nuts and 12 parallel ground washers
- Lubricate threads and under heads with ARP Ultra-Torque assembly lube for correct preload
- Package dimensions 2.25 x 6 x 7.75 inches
Installation Notes
- Professional installation recommended.
- Torque mains to ARP specifications in 3 stages with angle torquing for even clamping
- Compatible with stock and aftermarket main caps verify thread engagement on AMC/Jeep 4.0L blocks
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1987-2001 | Jeep | Cherokee | 4.0L Inline 6 Cylinder |
| 1986-1992 | Jeep | Comanche | 4.0L Inline 6 Cylinder |
| 1993-1998 | Jeep | Grand Cherokee | 4.0L Inline 6 Cylinder |
| 1987-1990 | Jeep | Wagoneer | 4.0L Inline 6 Cylinder |
| 1991 | Jeep | Grand Wagoneer | 4.0L Inline 6 Cylinder |
| 1987-1995 | Jeep | Wrangler | 4.0L Inline 6 Cylinder |
| 1997-2006 | Jeep | Wrangler | 4.0L Inline 6 Cylinder |
Why Choose ARP?
- ARP fasteners secure record-setting race engines worldwide
- CNC-machined threads and rolled splines ensure concentricity and strength
- Extensive testing proves durability beyond OEM limits
Frequently Asked Questions
-
Q: Will this kit fit my 1999 Jeep Wrangler 4.0L TJ?
A: Yes ARP 146-5401 fits all 1987-2006 Jeep 4.0L inline 6 engines including TJ Wrangler models with no modifications required -
Q: What material are the studs made from?
A: Studs are forged from proprietary ARP2000 chrome moly alloy with superior fatigue resistance over factory 8740 steel -
Q: Does ARP offer a warranty on this kit?
A: ARP provides a limited lifetime warranty against manufacturing defects for street-driven applications when installed and torqued correctly
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Cardboard box 2.25 x 6 x 7.75 inches
- Weight: 2.1 lbs
ARP Head Studs
ARP head stud kits for internal engine builds are stocked at Black Ops Auto Works. Shop ARP head stud and bolt kits, main stud kits, and rod bolt kits engineered for HEMI, Ford Modular and Coyote, GM LS, Subaru EJ, Honda K and B series, VW/Audi turbo four cylinders, Porsche, BMC, and Renault engines, along with the Ultra-Torque assembly lubricant every kit depends on. Every product is filterable by year, make, model, and engine platform so the correct fastener kit ships the first time. Black Ops Auto Works carries 812 ARP Head Studs SKUs across 8740 chromoly and ARP2000 alloy options. What This Collection Covers ARP head studs replace factory head bolts with precision-machined threaded studs that thread into the block and allow the nut to be torqued concentrically on a stationary fastener, producing more even and repeatable clamping force across the entire head gasket surface than a factory head bolt design. This collection focuses on the internal engine fasteners that hold the ...
View ARP Head Studs Products
Head Components
Cylinder head components and engine internals for performance builds and OE service are stocked at Black Ops Auto Works. Shop complete cylinder heads, head gaskets, head stud and bolt kits, rocker arms, lifters, camshaft and lifter kits, rotating assemblies, and main stud and bolt kits for LS, LT, HEMI 5.7/6.1/6.4, Coyote, Cummins, Powerstroke, VW/Audi turbo, Subaru, Nissan, and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 972 Head Components SKUs across component type, engine platform, and bore or gasket specification. What This Collection Covers Head Components groups together the parts that live at and around the cylinder head, the area of the engine most affected by heat, combustion pressure, and clamping load. This includes complete heads, head gaskets, head studs and bolts, rocker arms, lifters, camshaft and lifter kits, main stud and bolt kits, and ro...
View Head Components Products
Main Stud & Bolt Kits
Main stud kits, main bolt kits and engine bottom end fasteners for performance engine builds are stocked at Black Ops Auto Works. Shop ARP main studs, main cap bolts, block bolts, main cap hardware, fastener lubricant and build hardware for LS, Coyote, Hemi, K20, K24, 2JZ, RB, EJ, SBC, BBC, 4B11 and modular Ford engine combinations. Every product is filterable by engine family, year, make, model and application so the correct main cap configuration, thread pitch, fastener length and oil pan clearance can be confirmed before ordering. Black Ops Auto Works carries 84 main stud and bolt kit SKUs for street, boosted, stroker and competition engine builds. What This Main Stud & Bolt Kits Collection Covers Main studs and bolts secure the main caps that support the crankshaft. They are critical engine fasteners because cap movement or inconsistent clamp load can affect bearing clearance, crankshaft alignment and durability under high cylinder pressure or rpm. Stud Kits and Main Bol...
View Main Stud & Bolt Kits Products