SKU: 147-2503 | UPC: 672036043223
ARP Harmonic Damper Bolt Kit Dodge/Cummins 5.9L & 6.7L 24V (2003 & later) (4 pcs.)
ARP Harmonic Damper Bolt Kit 147-2503 locks the harmonic balancer in place on Dodge Ram trucks with Cummins 5.9L and 6.7L 24V common rail diesel engines from 2003 onward. These high-strength bolts absorb massive kinetic energy from crankshaft twist and flex for reliable engine operation under high loads. Engineered to deliver maximum clamping force they prevent damper slippage during demanding performance use.
Key Features
- 190,000 PSI Tensile Strength: Handles extreme torque and vibration without yielding for long-term durability
- 8740 Chrome Moly Construction: Forged steel alloy provides superior fatigue resistance in high-stress diesel applications
- Black Oxide Finish: Resists corrosion and eases installation while maintaining a professional appearance
- 1/4-Inch Thick Wide-Area Washer: Distributes clamping load evenly to protect surfaces and ensure secure fit
- Extra-Tall 12-Point Head: Accepts deep 3/4-inch socket to prevent stripping and simplify wrenching
Product Notes
- Kit includes 4 bolts sized 3/8-24 x 2.40-inch for direct OEM replacement
- Use ARP Ultra-Torque assembly lubricant for accurate torque values
- Ships in compact ARP-branded box measuring 5 x 3.5 x 1 inches
Installation Notes
- Professional installation recommended.
- Torque to 250 ft-lbs using ARP Ultra-Torque lube and calibrated torque wrench
- Requires 3/4-inch 12-point deep socket. clean threads before assembly
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2007 | Dodge | Ram 2500 Pickup | 5.9L Diesel |
| 2003-2007 | Dodge | Ram 3500 Pickup | 5.9L Diesel |
| 2003-2007 | Dodge | Ram 3500 Cab Chassis | 5.9L Diesel |
| 2007-2009 | Dodge | Ram 2500 Pickup | 6.7L Diesel |
| 2007-2009 | Dodge | Ram 3500 Pickup | 6.7L Diesel |
| 2007-2009 | Dodge | Ram 3500 Cab Chassis | 6.7L Diesel |
| 2010-2018 | Ram | 2500 Pickup | 6.7L Cummins Diesel |
| 2010-2018 | Ram | 3500 Pickup | 6.7L Cummins Diesel |
| 2010-2018 | Ram | 3500 Cab Chassis | 6.7L Cummins Diesel |
| 2019-2024 | Ram | 2500 | 6.7L Cummins Diesel |
| 2019-2024 | Ram | 3500 | 6.7L Cummins Diesel |
| 2019-2024 | Ram | 4500/5500 Cab Chassis | 6.7L Cummins Diesel |
Why Choose ARP?
- ARP sets the industry standard for racing and performance fasteners trusted worldwide
- Every bolt undergoes rigorous testing for consistent strength and reliability
- Precision machining and heat treatment ensure exact fit and peak performance
Frequently Asked Questions
- Q: Does this kit fit 2007.5-2008 early 6.7L Cummins engines?
A: Yes ARP 147-2503 fits all 2007.5+ 6.7L 24V common rail Cummins as well as 2003-2007 5.9L 24V common rail in Dodge Ram trucks - Q: What material and strength rating do these bolts have?
A: Made from forged 8740 chrome moly steel heat-treated to 190,000 psi tensile strength with black oxide finish for corrosion resistance - Q: What is the recommended torque spec and tools needed?
A: Torque to 250 ft-lbs using ARP Ultra-Torque lube a calibrated torque wrench and 3/4-inch 12-point deep socket ARP offers lifetime limited warranty
Shipping & Handling
- Method: UPS Ground / USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: ARP protective box 5 x 3.5 x 1 inches
- Weight: 0.31 lbs
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