Description
Product Overview
The Stage 8 8918S hex bolt is engineered for high‑performance exhaust systems. Crafted from premium alloy steel and hardened to Grade 8, it delivers a minimum shear strength of 150 ksi, ensuring the bolt will not stretch even under extreme heat. A duplex nickel exterior finish provides a sleek appearance while protecting against rust and corrosion. The bolt features a 3/8‑16 UNC thread, right‑hand thread style, and a double‑hex head with a recessed 3/16‑inch Allen socket for precise torque application without the need for a wrench.
Usage
Designed for automotive exhaust header installations, this bolt excels in both street and track environments where temperatures can exceed 1000°F. It is ideal for performance enthusiasts, professional mechanics, and DIY builders who demand a fastener that maintains clamping force after repeated heating cycles. Whether you are assembling a new header, replacing worn bolts, or upgrading an existing system, the Stage 8 hex bolt offers reliable, repeatable results.
Why Choose Us
Stage 8 is a trusted name in performance fasteners, and the 8918S model reflects decades of engineering expertise. Each bolt undergoes rigorous testing to meet SAE Grade 8 specifications, guaranteeing consistent hardness and tensile strength. The duplex nickel coating not only enhances visual appeal but also extends service life by resisting the harsh chemicals and moisture encountered in under‑hood environments. Additionally, the removable and reusable design allows for easy inspection and re‑torquing, reducing maintenance time and cost.
Key Features
- Grade 8 alloy steel construction for maximum shear strength and heat resistance
- Duplex nickel finish provides superior corrosion protection and a polished look
- Double‑hex head with recessed 3/16″ Allen socket for quick, wrench‑free installation
- Removable and reusable; visual torque check without additional tools
- 3/8‑16 UNC right‑hand thread, compatible with standard exhaust header applications
FAQ
Can this bolt be used on stock exhaust systems?
Yes, the 3/8‑16 UNC thread size is standard for many stock and aftermarket headers, making it a versatile replacement for original equipment fasteners.
Is the nickel coating durable enough for track use?
The duplex nickel finish is engineered to withstand high temperatures and exposure to road salts, providing long‑term corrosion resistance even in demanding track conditions.
How do I verify the bolt is properly tightened?
The double‑hex head allows you to visually confirm torque by checking the alignment of the recessed Allen socket; no additional wrench is required for a quick inspection.
Can I reuse the bolt after removal?
Absolutely. The Grade 8 alloy steel retains its strength after multiple install cycles, and the removable design makes re‑use straightforward.
What is the recommended torque setting?
For optimal performance, torque the bolt to 70 lb‑ft (95 Nm). This ensures a secure clamp while avoiding over‑stress on the threads.
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