What is the tensile strength of these main bolts?

These ARP main bolts are made from 8740 chromoly steel and have a tensile strength of 200,000 psi. This is a notable increase over standard factory bolts.

Do these bolts come with installation instructions?

Yes, the kit includes ARP's specialized assembly lube and torque specifications. It's important to follow these instructions carefully for proper installation and engine performance.

What is the main advantage of using ARP main bolts over stock bolts?

ARP main bolts offer significantly higher tensile strength and are made from a more robust material. This results in a stronger clamping force on the main caps, which is crucial for preventing cap walk and maintaining bearing integrity in high-performance or heavily used engines.

ARP SB Ford 4-Bolt Main Bolt Kit 154-5201

Name: ARP SB Ford 4-bolt main bolt kit
Brand: ARP
SKU: arp-arp-sb-ford-4-bolt-main-bolt-kit-t14-853938
Price: 83.12 USD
Availability: BackOrder

ARP SB Ford 4-bolt main bolt kit

$83.12

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ARP SB Ford 4-bolt main bolt kit.

Key Features

Fits Ford small block 4-bolt main engine blocks.
Made from ARP 8740 chromoly steel with a tensile strength of 200,000 psi.
Provides a stronger and more reliable clamping force for main caps compared to stock bolts.
Helps reduce main cap walk under high stress conditions.
Includes ARP's specialized assembly lube for proper installation.
Designed for engine rebuilding and performance applications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

If you're rebuilding the bottom end of your Ford small block engine, especially one that's going to see some serious use, you'll want to make sure those main caps are secured properly. This ARP main bolt kit is designed to replace the factory bolts on a 4-bolt main block, offering a stronger connection for the crankshaft main bearings.

ARP fasteners are well-known in the performance and racing world for their strength and reliability. These bolts are made from ARP's proprietary 8740 chromoly steel, which is heat-treated to achieve a tensile strength of 200,000 psi. This is a significant improvement over stock bolts, providing a more rigid foundation for your crankshaft and reducing the risk of main cap walk under high loads. The kit includes the necessary bolts and a small quantity of ARP's assembly lube, which is crucial for proper installation and to prevent galling.

When installing these bolts, it's important to follow ARP's recommended torque-to-yield specifications, which are slightly different from stock. Using the correct torque sequence and lubricant ensures the bolts stretch evenly and create the precise clamping force needed for optimal bearing performance and engine longevity. This kit is a solid option for anyone looking to build a durable Ford small block.