Product Description
LOCK DOWN YOUR 12-VALVE BOTTOM END. The ARP 247-5402 14mm Main Stud Kit is the proven upgrade for 1989–1997 Dodge Ram 5.9L Cummins 12V builders who demand rock-solid main cap clamping, better bearing alignment, and insurance against cap walk in high-cylinder-pressure builds. Manufactured from premium 8740 chromoly and heat-treated for exceptional tensile strength, this kit delivers repeatable torque, serviceability, and durability your lower end can count on.
Ideal for performance street, towing, and competition builds, ARP’s precision rolled threads and premium hardware help stabilize the main web under boost and rpm. Pair this kit with complementary ARP hardware for a bulletproof short block strategy.
Fitment
- 1989–1997 Dodge Ram 2500/3500 with 5.9L Cummins 12-Valve (14mm mains)
- Engine family: 6BT 5.9L 12V (non-stiffener plate block)
Recommended ARP Complements (Cross-Reference)
- ARP 247-4203 Head Stud Kit – 1989–1998 5.9L 12V
- ARP 147-2502 Harmonic Damper Bolt – 1989–2007 5.9L
- ARP 247-6303 Rod Bolt Kit – 1989–2018 5.9L/6.7L
- ARP 247-5401 Main Stud Kit – 1997.5–2024 5.9L/6.7L (without stiffener)
- ARP 247-5403 Main Stud Kit – 2003–2018 5.9L/6.7L (with factory stiffener)
FAQ — WHAT TORQUE VALUES SHOULD I USE?
Follow the ARP instructions included with the kit and use ARP Ultra-Torque assembly lube for accurate preload.
FAQ — DO THESE STUDS HELP WITH MAIN CAP WALK?
Yes. Studs provide improved clamping and thread engagement versus bolts, helping reduce cap walk/fretting in high-load applications.
FAQ — WILL THIS FIT MY 24-VALVE ENGINE?
No. This kit is for 1989–1997 12-valve applications with 14mm mains. For later engines, see the recommended ARP kits above.
FAQ — IS MACHINE WORK REQUIRED?
Most installs are straightforward; always check main housing bore and line-hone as needed any time main hardware is changed.
Specifications for ARP 247-5402
| Brand | ARP (Automotive Racing Products) |
| Part Number | 247-5402 |
| UPC | 672036034603 |
| GTIN | 672036034603 |
| Application | 1989–1997 Dodge Ram 5.9L Cummins 12-Valve (14mm mains) |
| Material | 8740 chromoly steel, heat-treated |
| Includes | Studs, nuts, washers, ARP assembly lube |
| Shipping Info | Calculated at checkout; approx. package size 8.00" (W) × 4.00" (H) × 10.00" (D) |
| Cross Reference | 247-4203, 147-2502, 247-6303, 247-5401, 247-5403 |
| E-codes | Not emissions-related (N/A) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
