PPE Head Stud Kit

1989–1998 Dodge Cummins 5.9L 12V

218034200

Overview:

The PPE Head Stud Kit is engineered specifically for the Dodge Cummins 5.9L 12-valve engines produced between 1989 and 1998. Designed for serious diesel enthusiasts and professional engine builders, this kit provides superior clamping force and durability to withstand the extreme pressures generated by high-performance and boosted diesel applications. Whether you are upgrading for heavy towing, off-road use, or competitive racing, these head studs deliver the reliability and strength needed to maintain engine integrity under demanding conditions.

Built to exceed industry standards, the PPE Head Stud Kit offers peace of mind with precision manufacturing and materials that outperform many OEM and aftermarket alternatives. This kit is highly recommended for engines running boost levels of 45 psi and above, ensuring your cylinder head remains securely fastened during intense combustion events.

Key Features:

Every component in the PPE Head Stud Kit is designed for maximum strength, accuracy, and longevity. Key features include:

• Precision centerless ground studs for exact fit and alignment
• Threads rolled to Mil-S-8879 specifications to increase tensile strength and reduce stress concentration
• Independently tested tensile strength exceeding 231,900 psi, outperforming many leading manufacturers
• Complete kit includes hardened parallel washers, nuts, and specially formulated assembly grease for uniform load distribution and accurate torque application
• Stud lengths tailored for specific head bolt locations: short, medium, and long studs included
• Flange bolts and nuts designed for secure fastening with 12-point sockets for ease of installation
• Recommended for high-boost diesel engines, ensuring durability under extreme conditions

Construction & Design:

The PPE Head Stud Kit is manufactured from premium-grade alloy steel, chosen for its exceptional tensile strength and fatigue resistance. Each stud undergoes a centerless grinding process to achieve precise diameter and surface finish, ensuring consistent clamping force and fitment accuracy. The thread rolling process enhances the stud’s mechanical properties by aligning the grain structure, which increases strength while minimizing the risk of thread failure.

Included hardened washers and nuts are engineered to distribute load evenly across the cylinder head surface, preventing warping and maintaining a reliable seal. The specially formulated assembly grease reduces friction during installation, allowing for precise torque readings and preventing galling or thread damage.

Installation & Fitment:

This head stud kit is a direct fit replacement for the Dodge Cummins 5.9L 12V engines from 1989 through 1998. Installation requires removal of the cylinder head and replacement of the factory head bolts with the supplied studs, nuts, washers, and flange bolts. The included grease should be applied to threads to ensure accurate torque application and prevent seizing. No modifications to the engine block or head are necessary, making this an ideal upgrade for both rebuilds and performance enhancements.

What's Included:

• 6 x 96mm length studs (M12-1.25 & M12-1.75 thread pitches)
• 14 x 146mm length studs (M12-1.25 & M12-1.75 thread pitches)
• 6 x 200mm length studs (M12-1.25 & M12-1.75 thread pitches)
• 6 x M8-1.25 x 75mm flange bolts (15mm outer diameter)
• 26 x M12-1.25 flange nuts (21mm outer diameter)
• 26 x M12 flat washers (22mm outer diameter)
• 1 x Pack of specially formulated assembly grease for thread lubrication

Ideal For:

This PPE Head Stud Kit is ideal for diesel performance enthusiasts, professional engine builders, and anyone upgrading their Dodge Cummins 5.9L 12V engine for higher boost levels or increased reliability. It is especially suited for applications involving heavy towing, off-road use, or competitive drag and truck pulling where engine durability and head gasket integrity are critical.

Pacific Performance Engineering (PPE) develops heavy-duty and performance upgrades for trucks and diesel platforms, including differential covers, transmission pans, oiling and cooling components, and other durability-minded parts. PPE products are built to handle heat, load, and power—ideal for tow rigs and performance builds that need stronger hardware and better fluid control.