Product: Main Stud Kit Fitment: 1989 – 1998 Dodge D250 12V Cummins 5.9L LB7 & LLY Engines Only 1989 – 1998 Dodge D350 12V Cummins 5.9L LB7 & LLY Engines Only 1989 – 1998 Dodge Ram 2500 12V Cummins 5.9L LB7 & LLY Engines Only 1989 – 1998 Dodge Ram 3500 12V Cummins 5.9L LB7 & LLY Engines Only 1989 – 1998 Dodge W250 12V Cummins 5.9L LB7 & LLY Engines Only 1989 – 1998 Dodge W350 12V Cummins 5.9L LB7 & LLY Engines Only. These studs measure 14 mm. Before purchasing, please confirm that your vehicle is an early 1997 model or older, as they are not compatible with late 1997 models. For head studs, please check our catalog. Ultra Strength – Utilizing XOTIC 7200 material, these main studs offer superior tensile strength compared to standard 8740 chromoly steel. Rated at 220,000 psi tensile strength, these studs provide significantly enhanced clamping forces, surpassing those of standard bolts. Prevents Main Cap Shifting – Main studs provide enhanced cap alignment, reducing the risk of main cap walking or shifting under extreme loads. Unlike bolts, studs remain stationary, offering better thread engagement and longevity. Easy Installation – Broached stud ends allow for easier and more precise installation. Includes a detailed instruction manual with diagrams for a seamless setup. This is NOT a head stud kit. What’s in the box: 14x Main Studs, 14x Nuts, 14x Hardened Parallel Washers, 1x Fastener Assembly Lubricant & Instructions Manual. Please report any errors within 24 hrs of receiving product.