The ARP 247‑4202 Diesel Head Stud Kit is a premium upgrade for 1998.5–2024 Dodge Ram trucks equipped with 24-valve 5.9L or 6.7L Cummins engines. Unlike the weaker torque-to-yield head bolts used from the factory, this kit replaces them with high-strength head studs constructed from ARP2000 alloy. ARP2000 offers an impressive tensile strength of 220,000 PSI, surpassing comparable tooling-grade alloys. The studs are precision-machined—heat-treated before thread rolling for superior fatigue resistance, shot-peened for surface durability, ground for perfect concentricity, and finished with corrosion-resistant black oxide plating. A complete set of strength-enhancing washers and nuts (12-point chrome-moly) is included, along with ARP assembly lubricant for optimal installation.
Head studs provide significantly improved clamping force, helping prevent head lift in high-pressure or modified engine setups, resolving a common weakness of OEM head bolts
Key Features
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Made from high-strength ARP2000 alloy (220,000 PSI tensile strength)
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Chrome-moly 12-point nuts for maximum reliability
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Black oxide coating for enhanced corrosion resistance
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Heat-treated before thread rolling, offering superior fatigue strength
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Shot-peened and centerless ground studs for durability and precision
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Broached stud ends for easier installation and cylinder head removal
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Includes hardened parallel-ground washers for accurate load distribution and torque readings
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Comes with 0.5 oz of ARP assembly lubricant for correct bolt preload
Specifications
| Attribute | Details |
|---|---|
| Part Number (MPN) | 247-4202 |
| SKU / ID | ARP247‑4202 / 1554 |
| GTIN | 672036026844 |
| Manufacturer | ARP |
| Fitment | 1998.5–2024 Dodge Ram—5.9L/6.7L Cummins 24V |
| Shipping Weight | 9 lb |
| Dimensions (L×W×H) | ~11 in × 8 in × 3 in |
| Fuel Type | Diesel |
| Cross-References | 3927063, 5011403AA, HB33092 |
| Prop 65 Warning | Contains chemicals known to cause cancer & reproductive harm |