PPE Main Stud & Girdle Bolt Kit

2007–2010 Dodge Ram 6.7L Diesel, 2011–2015 Ram 3500 6.7L Diesel, 2011–2018 Ram 2500 6.7L Diesel

Part #: 218035500

Overview

The PPE Main Stud and Girdle Bolt Kit is a precision-engineered upgrade designed specifically for Dodge Ram Cummins 6.7L engines from 2007.5 through 2018. This kit replaces the factory main cap bolts with high-strength chrome-moly studs and girdle bolts, providing superior clamping force and durability. It is an essential reinforcement for maintaining crankshaft alignment and ensuring the integrity of the main bearing caps, especially under high-stress conditions.

Ideal for diesel enthusiasts, performance builders, and heavy-duty users, this kit significantly reduces the risk of main cap bolt stretch or failure, which can lead to catastrophic engine damage. Whether you are towing heavy loads, building high horsepower, or simply seeking enhanced engine reliability, the PPE Main Stud and Girdle Bolt Kit delivers peace of mind and long-lasting performance.

Key Features

Engineered for strength, durability, and precise fitment, this kit includes:

• Premium chrome-moly alloy studs with a yield strength exceeding 215,000 psi and tensile strength over 230,000 psi
• Heat-treated studs for enhanced strength and fatigue resistance
• Centerless ground and thread-rolled studs to minimize stress concentrations and improve longevity
• EDM broaching for precise stud geometry and perfect fitment
• Black oxide finish on all studs and nuts for corrosion resistance and a professional appearance
• Compatibility with the stock main cap girdle for straightforward installation
• M10 girdle bolts featuring a 12-point head for secure, high-torque fastening
• Assembly lubricant packet included to ensure uniform load distribution and accurate torque readings

Construction & Design

The studs are crafted from high-grade chrome-moly alloy, known for its exceptional strength-to-weight ratio and excellent fatigue resistance. Each stud undergoes a rigorous heat treatment process to optimize mechanical properties, followed by centerless grinding and thread rolling to reduce stress risers that can cause premature failure. The use of EDM (Electrical Discharge Machining) broaching ensures precise and consistent stud dimensions, which is critical for maintaining proper main cap alignment and overall engine integrity.

The black oxide finish not only enhances corrosion resistance but also provides a sleek, professional look. The included M10 girdle bolts feature 12-point heads designed for maximum torque application and durability, perfectly complementing the studs and ensuring a secure bottom-end assembly.

Installation & Fitment

This Main Stud and Girdle Bolt Kit is a direct fit for Dodge Ram Cummins 6.7L engines from 2007.5 through 2018 and is fully compatible with the stock main cap girdle. Installation requires standard engine disassembly and adherence to proper torque specifications to achieve optimal performance and reliability. The included assembly lubricant packet helps ensure accurate torque readings and uniform load distribution during installation.

While professional installation is recommended to guarantee correct fitment and torque, experienced enthusiasts equipped with the right tools can perform this upgrade to significantly enhance engine bottom-end durability.

What's Included

• Chrome-moly main studs (heat treated, centerless ground, thread rolled)
• Black oxide finish nuts
• M10 12-point girdle bolts
• Assembly lubricant packet

Ideal For

This kit is perfect for diesel performance enthusiasts, engine builders, and anyone looking to reinforce the bottom end of their Dodge Ram Cummins 6.7L engine. It is especially beneficial for vehicles subjected to heavy towing, high horsepower builds, or extended operation under demanding conditions where factory main cap bolts may be prone to stretching or failure.

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.