ARP247-4204 Diesel Custom Age 625+ Head Stud Kit 98.5-24 Dodge / Ram

The ARP 247-4204 Diesel Custom Age 625+ Head Stud Kit from XDP is the ideal upgrade for your competition or high-horsepower 1998.5-2024 Dodge Ram 5.9L/6.7L Diesel. ARP is the industry leader when it comes to fasteners and offers heavy-duty head studs for a wide variety of popular diesel applications. Using head studs instead of standard head bolts provides your engine with the clamping force required to keep your cylinder head from lifting due to higher combustion pressures. It's a proven fact that OEM head bolts are the weak link in a diesel engine; especially when the engine has been heavily modified. That's because most engines are typically assembled from the factory using weaker 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. Furthermore, because TTY bolts are yielded by design, they should never be re-used. The 247-4204 Head Studs utilize ARP's Custom Age 625+ featuring a high-strength chromium-cobalt nickel alloy. This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness, with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Typical tensile strength is 260,000-280,000 psi and a yield strength of 235,000-255,000 psi. This results in a fastener that is stronger than Chrome Moly 8740 and ARP 2000, and is well suited for use in high-performance applications.ARP head studs begin by being placed vertically into special racks and precisely heat-treated. This procedure ensures complete heat penetration and is far superior to those lower quality studs from other manufacturers who just place the pieces in a basket. Head studs then move to a centerless grinding process to ensure that they are perfectly concentric. As many as ten separate machining steps are required to achieve this level of accuracy. The thread rolling operation is also done after the heat-treatment, which gives them about 2000% (that's 20 times) better fatigue strength than lesser 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 additional effort. Fasteners are then shot-peened to remove any surface irregularities and upgrade the overall external integrity. Finally, a metal finishing process is also performed in-house with a durable black oxide coating applied for improved corrosion resistance.There is a good reason that virtually every top professional engine builder relies on ARP head studs for their all-out competition powerplants. Simply put, 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 diesel engines found in Ram 2500/3500 pickups.Features:Custom Age 625 Plus Super Alloy235K-255K psi Yield Strength260K-280K psi Tensile StrengthIncludes Chrome Moly Steel 12-Point NutsBlack Oxide Coating For Improved Corrosion ResistanceCenterless Ground To Ensure They Are Perfectly ConcentricImproved Clamping Force Prevents Cylinder Heads From LiftingBroached Stud Ends Install & Make Cylinder Head Removal EasierHeat-Treated Prior To Thread Rolling And Machining For Optimum Fatigue StrengthShot-Peened To Remove Any Surface Irregularities And Upgrade The Overall External IntegrityHardened Parallel Ground Washers For An Even Load Distribution And More Accurate Torque ReadingsComes With 0.5oz Of ARP Fastener Assembly LubricantXDP Thread Cleaning Chaser XD40125TC (Sold Separately):The XDP XD40125TC Thread Cleaning Chaser is an excellent add-on for any shop, technician, or at-home mechanic. Thread Cleaning Chasers allow you to ensure that the threads in your engine block have been properly cleaned before the installation of this head stud kit. Clean threads will provide you with accurate torque readings which are critical during your head gasket repair or engine build.Most orders ship within 24 hours. If backordered, a representative will contact you within 1-2 business days.