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USD 459.99
Part #: ARP247-4202

ARP 247-4202 Diesel Head Stud Kit

1998.5-2021 Dodge Ram 5.9/6.7L Cummins 24V
Part #: ARP247-4202
★★★★★ ★★★★★ 19 Reviews
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The ARP 247-4202 Diesel Head Stud Kit from XDP let's you build your 1998.5-2021 Dodge Ram 5.9L/6.7L Cummins engine to last. It’s a proven fact that OEM head bolts are the weak link in a diesel engine; especially if the engine has been modified. That’s because most engines are typically assembled from the factory using Torque-To-Yield (TTY) bolts and preloaded to yield and beyond (typically 100-110%). Any increases in combustion pressure can lead to problems like blown head gaskets or catastrophic engine failure. And because TTY bolts are yielded by design, they should never be re-used.

ARP is the industry leader and builds heavy-duty head studs and fasteners for a wide variety of popular diesel applications. Using head studs instead of standard bolts provides your engine with the clamping force required to keep your cylinder head from lifting due to higher combustion pressures. For the 247-4202 Head Studs, ARP starts with a premium grade ARP2000 alloy that is rated far superior to aircraft quality alloy steels. ARP2000 is an alloy steel that can be safely heat treated to a higher level, producing a greater strength material than Chrome Moly 8740. While 8740 and ARP2000 share similar characteristics, ARP2000 is capable of achieving a higher clamp load at 220,000 psi.

Each stud is placed vertically into special racks and precisely heat-treated. This procedure ensures complete heat penetration, and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.The head studs next go through a centerless grinding process to ensure that they are perfectly concentric. As many as ten machining steps are required to achieve this level of accuracy. The thread rolling operation (to MIL-S-8879A specs) is also done after the heat-treatment, which gives them about 2000% (that’s twenty times) better fatigue strength than studs that are threaded prior to heat-treat. It costs a lot more to do it this way, because it’s tough on tooling, but the results are worth the extra effort. Fasteners are then shot-peened to remove any surface irregularities and improve overall external integrity. The final step is a metal finishing process that is also performed in-house at ARP with a black oxide coating applied for long lasting corrosion resistance.

It is for good reason that virtually every top professional engine builder relies on ARP head studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on the market today. This head stud kit is a direct-fit for 24-valve 5.9L and 6.7L Cummins engines found in Dodge Ram 2500/3500 pickups.

  • Proprietary ARP 2000 Material
  • Rated At 220,000 Psi Tensile Strength
  • Includes Chrome Moly Steel 12-Point Nuts
  • Black Oxide Coating For Added Corrosion Resistance
  • Centerless Ground To Ensure They Are Perfectly Concentric
  • Improved Clamping Force Prevents Cylinder Heads From Lifting
  • Broached Stud Ends Install & Make Cylinder Head Removal Easier
  • Heat-Treated Prior To Thread Rolling And Machining For Optimum Fatigue Strength
  • Shot-Peened To Remove Any Surface Irregularities And Improve Overall External Integrity
  • Hardened Parallel Ground Washers For An Even Load Distribution And Accurate Torque Readings
  • Comes With 0.5oz Of ARP Assembly Lubricant

    Vehicle Applications

    1998.5 Dodge 5.9L 24V Cummins
    1999 Dodge 5.9L 24V Cummins
    2000 Dodge 5.9L 24V Cummins
    2001 Dodge 5.9L 24V Cummins
    2002 Dodge 5.9L 24V Cummins
    2003 Dodge 5.9L 24V Cummins
    2004 Dodge 5.9L 24V Cummins
    2004.5 Dodge 5.9L 24V Cummins
    2005 Dodge 5.9L 24V Cummins
    2006 Dodge 5.9L 24V Cummins
    2007 Dodge 5.9L 24V Cummins
    2007.5 Dodge 6.7L 24V Cummins
    2008 Dodge 6.7L 24V Cummins
    2009 Dodge 6.7L 24V Cummins
    2010 Ram 6.7L 24V Cummins
    2011 Ram 6.7L 24V Cummins
    2012 Ram 6.7L 24V Cummins
    2013 Ram 6.7L 24V Cummins
    2014 Ram 6.7L 24V Cummins
    2015 Ram 6.7L 24V Cummins
    2016 Ram 6.7L 24V Cummins
    2017 Ram 6.7L 24V Cummins
    2018 Ram 6.7L 24V Cummins
    2019 Ram 6.7L 24V Cummins
    2020 Ram 6.7L 24V Cummins
    2021 Ram 6.7L 24V Cummins


    • MFG. Number 247-4202
    • Manufacturer Name ARP
    • Shipping Weight 9.00 lb.
    • Shipping Length 11 in.
    • Shipping Width 8 in.
    • Shipping Height 3 in.
    • Fuel Type Diesel
    • UPC 672036026844
    • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
    • Cross Reference # 3010HS
    • Internal L128.00R186.00


    ★★★★★ ★★★★★
    4.7/5 Stars out of 19 Reviews
    Verified Buyer
    Owner R&W Auto &Truck Repair
    Fast and efficient!
    Verified Buyer
    Parts arrived incomplete
    ARP head studs arrived incomplete. After beginning the installation I found that one of the head stud nuts had not been threaded. The kit only comes with the exact number of pieces, so I had to search local machine shops to find a nut to complete the installation. You would assume with the amount these cost there would be a better quality check from ARP before packaging. If anyone decides to purchase ARP head studs I would recommend a thorough investigation of all pieces prior to installation so you don't get stuck scrambling like I did.
    Verified Buyer
    ARP Head Studs
    From first-hand experience, this is a MUST-HAVE upgrade BEFORE tuning! This investment is much cheaper than a head replacement!! If done BEFORE head gasket issues, you can replace the head bolts for head studs one-for-one and the only part is being man enough to torque the studs up to 125 ft/lbs!
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    Questions and Answers

    Do you have Install Instructions?
    View Staff Answer 

    Click Here for the ARP Install Instructions

    Note: It will be necessary to machine the lower rocker arm cover at the No. 24 bolt hole location in the torque sequence to facilitate installation of the lower rocker arm cover

    Will these head bolts work on a 2014 6.7L Cummins?
    View Staff Answer 

    The ARP studs are listed on the manufacturers site for the Dodge Cummins 5.9L/6.7L 24V '98 - Present.

    Can you change one at a time?
    View Staff Answer 

    Yes it can be done. You must maintain stock torque on the cylinder head until all stock bolts have been replaced with ARP studs one at a time. After this is done, you can then follow the torque sequence to being bringing the stud up to their final torque. (This is done in small increments.)

    What is the maximum torque?? 125 seems very little
    View Staff Answer 

    125 ft/lbs is the max recommended by ARP - In actual practice many installers go to 135 ft/lbs

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