SKU: 230-5402 | UPC: 672036035433
ARP Main Stud Kit for 2006-2010 Chevy GMC Duramax 6.6L LBZ and LMM Engines
The ARP Main Stud Kit fits 2006-2010 Chevrolet Silverado Sierra 2500HD 3500HD trucks with 6.6L Duramax LBZ and LMM diesel engines. This kit provides clamping force to prevent main cap walk and fretting under high loads from increased boost and fuel in rebuilt engines high-horsepower upgrades drag racing or sled pulling. Threads stay protected in the block with precise alignment during operation.
Key Features
- Material: 8740 chromoly steel heat-treated in-house to 200,000 psi tensile strength for reliable performance under extreme stress
- Thread Design: Precision J-form threads rolled after heat treatment to increase durability and prevent galling
- Kit Contents: 10 M14 x 1.5 J-form main studs 10 hardened parallel-ground washers 10 12-point nuts and one tube ARP Ultra-Torque lubricant for complete installation
- Torque Specs: M14 main studs to 175 ft-lbs M12 cross bolts to 90 ft-lbs in three equal steps using ARP lube and factory main cap sequence
- Socket Sizes: 11/16-inch 12-point for nuts 9/16-inch 12-point for studs 3/16-inch Allen hex for precise installation
Product Notes
- Clean all block threads with a chaser before assembly to ensure proper seating
- Verify main bearing bores for roundness and perform align hone if upgrading from stock fasteners
- Kit weight 5.7 lbs shipping box 8.5 inches L x 4 inches W x 2.3 inches H
Installation Notes
- Professional installation recommended.
- Use torque wrench rated to 175 ft-lbs and follow three-step tightening with included ARP Ultra-Torque lubricant
- Installs directly with supplied components no additional hardware needed compatible with 2-bolt main caps
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006-2010 | Chevrolet | Silverado 2500HD | Crew Cab Extended Cab Regular Cab 6.6L LBZ/LMM |
| 2006-2010 | Chevrolet | Silverado 3500HD | Single Cab Crew Cab 6.6L LBZ/LMM |
| 2006-2010 | GMC | Sierra 2500HD | Crew Cab Extended Cab Regular Cab 6.6L LBZ/LMM |
| 2006-2010 | GMC | Sierra 3500HD | Single Cab Crew Cab 6.6L LBZ/LMM |
Why Choose ARP?
- ARP fasteners power professional racing teams and engine builders worldwide
- In-house heat treatment delivers consistent 200,000 psi strength across every kit
- Precision rolled threads and quality control ensure long-term reliability in blocks
Frequently Asked Questions
- Q: Does this kit fit 2006-2010 Duramax LBZ and LMM engines only?
A: Yes designed for 6.6L LBZ 2006-2007 and LMM 2007.5-2010 in Chevy Silverado GMC Sierra 2500HD 3500HD. Use ARP 230-5401 for earlier LB7/LLY or different kits for LML/L5P. - Q: What material and strength rating do the studs have?
A: Constructed from 8740 chromoly steel heat-treated to 200,000 psi tensile strength with J-form threads rolled after treatment. - Q: What warranty coverage is provided?
A: ARP offers limited lifetime warranty against defects in materials and workmanship when installed and maintained properly.
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure box 8.5 inches L x 4 inches W x 2.3 inches H
- Weight: 5.7 lbs
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