Stage 8 Header Bolts & Locking Fasteners

2003–2026 Chrysler, Dodge, Ram, Jeep 5.7L Hemi / 6.1L SRT8 & 6.4L 392 / 6.2L SRT Hellcat, Trackhawk, TRX

Part #: 8916

Overview

The Stage 8 Header Bolts & Locking Fasteners Kit is engineered specifically for Chrysler, Dodge, Ram, and Jeep vehicles equipped with 5.7L Hemi, 6.1L and 6.4L SRT, and 6.2L SRT Hellcat engines from 2003 through 2026. Designed to secure exhaust headers with maximum reliability, this kit offers a fail-safe locking solution that prevents fastener loosening due to vibration and thermal cycling. Ideal for performance enthusiasts and professional mechanics alike, these locking fasteners ensure long-lasting durability and peace of mind during high-performance driving or daily use.

Stage 8 is renowned for producing the world’s best active mechanical locking systems. Their locking fasteners are reusable, removable, and allow for quick visual inspection, making maintenance straightforward without sacrificing security.

Key Features

Stage 8 locking fasteners combine innovative design with robust materials to deliver superior fastening security. Key features include:

• Active mechanical locking system that prevents fastener loosening under extreme conditions
• Compatible with 8mm-1.25x25mm bolts featuring a 6-point double hex head for enhanced torque application
• Reusable and removable design allows for multiple service intervals without replacement
• Visual inspection capability to confirm locking status at a glance
• Specifically engineered for Chrysler, Dodge, Ram, and Jeep 5.7L Hemi, 6.1L & 6.4L SRT, and 6.2L Hellcat engines
• Corrosion-resistant materials ensure longevity in harsh engine bay environments
• Designed to withstand thermal expansion and contraction cycles common in high-performance exhaust systems
• Precision manufacturing guarantees consistent fit and function

Construction & Design

Stage 8 locking fasteners are crafted from high-grade steel alloys treated for corrosion resistance and strength. The double hex head design allows for secure torque application using standard tools while minimizing the risk of rounding or damage during installation or removal. The active mechanical locking mechanism employs a patented system that locks the fastener in place without relying on adhesives or thread lockers, which can degrade over time. This design ensures consistent clamping force and prevents loosening caused by engine vibrations and heat cycles.

Installation & Fitment

Installation is straightforward and requires no special tools beyond a compatible socket or wrench for the 6-point double hex head bolts. The locking fasteners are designed to replace factory header bolts directly, fitting perfectly with OEM header flanges on the specified vehicles. No modifications to the exhaust system or engine components are necessary. Proper installation following Stage 8’s instructions ensures optimal locking performance and ease of future removal for maintenance or upgrades.

What's Included

• Seventeen (17) Stage 8 locking header bolts, 8mm-1.25x25mm, 6-point double hex head
• Locking fastener components integrated into each bolt
• Installation instructions for proper torque and locking procedure

Ideal For

This locking fastener kit is ideal for performance enthusiasts, professional mechanics, and anyone upgrading or maintaining exhaust headers on Chrysler, Dodge, Ram, and Jeep vehicles equipped with 5.7L Hemi, 6.1L & 6.4L SRT, or 6.2L SRT Hellcat engines. It is especially beneficial for those who demand reliable fastening under high vibration and thermal stress conditions, such as track use, towing, or heavy-duty applications.

Stage 8 builds aftermarket solutions for automotive enthusiasts—parts that complement performance upgrades, improve usability, and help round out a well-thought-out build. Designed with fitment and function in mind, Stage 8 is a dependable choice for daily-driven projects and more aggressive setups alike. Shop Stage 8 when you want upgrades that match a performance-focused direction.