Description
Product Overview
The ARP 655-3750 is a premium black‑oxide main bolt designed for high‑performance automotive applications. Constructed from Grade 8 stainless steel, each bolt offers exceptional tensile strength and corrosion resistance, making it ideal for demanding engine environments. The 7/16‑14″ RH thread provides a precise fit for standard crankshaft journals, while the 3.750″ overall length (UHL) ensures proper engagement with the engine block. The bolt features a machined hex head with a 6‑point design, allowing for higher torque application without rounding the corners. Included in the set are five bolts, each paired with a 1/2″ socket and a matching washer, delivering a complete solution for engine assembly or rebuild projects. ![[Product front view showing all components]](https://www.personallife.store/wp-content/uploads/2026/07/328fe34943f24dfaa500ba47d259f7d9.jpg)
Usage
These bolts are engineered for use in performance engines, race cars, and high‑output street vehicles where reliability under extreme conditions is critical. They are suitable for installing crankshafts, camshafts, and other rotating components that require a secure, torque‑resistant connection. The black‑oxide finish not only provides an attractive appearance but also adds an extra layer of protection against oil and heat exposure. Installers benefit from the included 1/2″ socket, which fits standard torque wrenches, reducing setup time and ensuring consistent torque values across all fasteners. Whether you are rebuilding a classic engine or upgrading a modern powerplant, the ARP 655‑3750 set delivers the confidence needed for demanding applications.
Why Choose Us
Choosing the ARP 655‑3750 means selecting a bolt that meets rigorous engineering standards and undergoes thorough quality testing. ARP’s reputation for precision manufacturing guarantees that each bolt conforms to exact specifications, minimizing the risk of thread stripping or head deformation. The Grade 8 stainless‑steel construction offers superior durability compared to standard carbon‑steel bolts, extending the service life of your engine. Additionally, the black‑oxide coating reduces glare and helps hide minor surface blemishes, keeping the engine bay looking clean. Our packaging includes all necessary components—bolts, sockets, and washers—so you receive a ready‑to‑install solution. Backed by a responsive customer support team, we provide technical assistance and warranty coverage to ensure your complete satisfaction.
Key Features
- Grade 8 stainless‑steel provides exceptional strength and corrosion resistance.
- Precise 7/16‑14″ RH thread ensures a perfect fit for high‑performance engines.
- 6‑point hex head allows higher torque without rounding, improving reliability.
- Included 1/2″ socket and washer give a complete installation package, saving time.
- Dedicated ARP support and warranty give peace of mind for professional and hobbyist users.
FAQ
What makes the black‑oxide finish beneficial?
The black‑oxide coating adds an extra barrier against oil, heat, and moisture, reducing the likelihood of rust and maintaining the bolt’s appearance over time.
Can these bolts be used on both street and race engines?
Yes, the ARP 655‑3750 is designed for a wide range of applications, from daily‑driver performance builds to full‑race specifications, thanks to its high tensile strength and precise threading.
Do I need any special tools to install the bolts?
The set includes a 1/2″ socket that fits standard torque wrenches, so no additional tools are required beyond a quality torque wrench for accurate tightening.
How do I verify the correct torque setting?
Refer to your engine’s service manual for the recommended torque value. ARP provides torque specifications on the packaging, and using a calibrated torque wrench will ensure proper installation.
Is there a warranty on these bolts?
ARP offers a limited warranty against manufacturing defects. If you encounter any issues, contact our customer support team with the purchase details for assistance.
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