Product Description
The ARP 247-5403 Main Stud Kit is designed for 2003-2018 Dodge Ram and Ram 5.9L/6.7L Cummins engines equipped with the factory block stiffener or girdle. This premium ARP hardware replaces factory main bolts with high-strength studs to improve bottom-end stability, reduce main cap movement, and increase durability in towing, performance, and high-cylinder-pressure diesel applications.
Manufactured from premium 8740 chromoly steel and heat-treated to approximately 200,000 PSI tensile strength, ARP 247-5403 main studs provide more consistent clamping force than factory hardware while helping protect engine block threads during repeated engine service and rebuilds.
FEATURES
- Designed for 2003-2018 5.9L and 6.7L Cummins engines
- For engines equipped with the factory block stiffener or girdle
- 8740 chromoly steel construction
- Approximately 200,000 PSI tensile strength rating
- Improves bottom-end clamping consistency and durability
- Helps reduce main cap walk and fretting
- Threads rolled after heat treatment for improved fatigue resistance
- Ideal for towing, competition, racing, and high-performance diesel builds
- Includes studs, nuts, washers, lubricant, and installation instructions
FITMENT
- 2003-2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- 2007.5-2018 Ram 2500/3500 6.7L Cummins
- 2008-2018 Ram 4500/5500 6.7L Cummins
- Fits engines equipped with the factory block stiffener or girdle
Fitment Note: This kit is intended for engines using the factory block stiffener or girdle. Engines without the stiffener require a different ARP main stud kit.
WHAT'S INCLUDED
- ARP main studs
- ARP nuts
- Hardened parallel-ground washers
- ARP Ultra-Torque fastener lubricant
- Installation instructions
CROSS-REFERENCE & RELATED PRODUCTS
- ARP 247-5401 Main Stud Kit Without Factory Block Stiffener
- ARP 247-5405 Main Stud Kit for 2007.5-2018 6.7L Cummins
- ARP 247-4202 Head Stud Kit
- ARP 247-4204 625 Series Head Stud Kit
- ARP Diesel Fasteners
WHY UPGRADE TO ARP MAIN STUDS?
High boost pressure, heavy towing loads, elevated cylinder pressure, and increased RPM can place tremendous stress on the lower end of a Cummins engine. ARP main studs provide superior clamping force and improved durability compared to factory bolts, helping stabilize the crankshaft and main caps under demanding diesel conditions.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | ARP |
| Part Number | 247-5403 |
| Engine Compatibility | 5.9L Cummins Common Rail / 6.7L Cummins |
| Fitment Years | 2003-2018 |
| Configuration | With factory block stiffener or girdle |
| Material | 8740 chromoly steel |
| Tensile Strength | Approximately 200,000 PSI |
| UPC / GTIN-12 | 672036035099 |
| Prop 65 | Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |
FAQ
Will ARP 247-5403 fit both 5.9L and 6.7L Cummins engines?
Yes. ARP 247-5403 is designed for 2003-2018 5.9L Common Rail and 6.7L Cummins engines equipped with the factory block stiffener or girdle.
What is the difference between ARP 247-5401 and ARP 247-5403?
ARP 247-5403 is intended for engines using the factory block stiffener or girdle, while ARP 247-5401 is designed for applications without the factory stiffener.
Why use main studs instead of factory main bolts?
Main studs provide more consistent clamping force, help reduce main cap movement, and improve lower-end durability in towing, racing, and high-horsepower diesel applications.
What material are ARP 247-5403 main studs made from?
ARP 247-5403 main studs are manufactured from premium 8740 chromoly steel and heat-treated to approximately 200,000 PSI tensile strength.
