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
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