Pro Series Chevy Small Block 2-Bolt Small Journal Main Bolt Kit

• Fits SBC 2-Bolt Small Journal Engines: Designed for Chevrolet Gen I Small Block small journal applications.

• 190,000 PSI Tensile Strength: Heat-treated 35 chromoly steel construction.

• Hex Head Main Bolts: Provides secure installation and straightforward serviceability.

• Ideal for Rebuilds & Restorations: Perfect for bottom-end service and engine assembly projects.

Strengthen the foundation of your engine with the Top Street Performance Pro Series Chevy Small Block 2-Bolt Small Journal Main Bolt Kit. Designed for Chevrolet Gen I Small Block engines equipped with 2-bolt main caps and small journal crankshafts, this SBC main bolt kit provides the strength and clamping force needed to help maintain secure main bearing cap retention in street, restoration, marine, and performance applications. Whether you're rebuilding a 265, 283, 302, or early 327 Small Block Chevy, these Small Block Chevy main bolts deliver dependable bottom-end fastening performance. The kit features heat-treated 35 chromoly steel construction with a minimum tensile strength of 190,000 PSI, rolled threads, and a black oxide finish with protective oil coating.

Secure Main Bearing Cap Retention
Designed to securely fasten the main bearing caps to the engine block, these SBC main cap bolts help maintain consistent clamping force and reliable crankshaft support. Ideal for engine rebuilds, rotating assembly service, and restoration projects requiring dependable main cap fasteners.

High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, this Small Block Chevy main bolt kit is built to withstand demanding engine conditions. Threads are rolled after heat treatment, tested for tensile and yield strength, and protected with a black oxide finish and oil coating for enhanced durability and corrosion resistance.

Designed for 2-Bolt Small Journal SBC Engines
Engine-specific design provides compatibility with Chevrolet Gen I Small Block engines utilizing 2-bolt main caps and small journal crankshaft configurations. These SBC main bearing cap bolts are ideal for stock replacement, engine rebuilds, restoration projects, and period-correct performance builds.

Ideal for Rebuilds & Restoration Projects
Perfect for engine assembly, rotating assembly service, bottom-end rebuilds, and restoration projects where fresh Small Block Chevy bottom-end hardware is recommended. An excellent choice for maintaining secure main cap retention in vintage Small Block Chevy applications.

What does this main bolt kit fit?
This kit is designed for Chevrolet Gen I Small Block engines equipped with 2-bolt main caps and small journal crankshafts, including many 265, 283, 302, and early 327 applications. Small journal SBC applications require different hardware than large journal engines.

What is a small journal Small Block Chevy?
Small journal SBC engines use smaller crankshaft main journal diameters than later large journal engines. Proper main cap hardware must match the engine block and crankshaft configuration.

Why replace main bolts during a rebuild?
Replacing main cap hardware during an engine rebuild helps ensure proper clamping force, reliable main bearing cap retention, and long-term durability.

Is this kit suitable for restoration projects?
Yes. This kit is an excellent choice for stock rebuilds, restoration projects, vintage performance engines, and marine applications using small journal Small Block Chevy blocks.

What material are the bolts made from?
The hardware is manufactured from heat-treated 35 chromoly steel with rolled threads, black oxide finish, and corrosion-resistant oil coating.

What is the difference between small journal and large journal SBC engines?
Small journal engines use smaller crankshaft main journal diameters and different main cap hardware than later large journal blocks. Hardware must match the specific block configuration.

Can these be used in performance applications?
Yes. The 190,000 PSI tensile strength construction makes them suitable for street performance, marine, and vintage racing applications.

Do these fit all Small Block Chevy engines?
No. This kit is specifically designed for compatible 2-bolt small journal Gen I Small Block Chevy applications. Verify block configuration before ordering.