Pro Series Chevy Big Block Cylinder Head 12-Point Bolt Kit

• Fits Original Big Block Chevy Heads: Designed for Chevrolet Mark IV factory-style cylinder head applications.

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

• 12-Point Head Design: Provides accurate torque readings and improved serviceability.

• Supports Reliable Head Gasket Sealing: Helps maintain consistent cylinder head clamping force.

Upgrade your engine build with the Top Street Performance Pro Series Big Block Chevy Cylinder Head 12-Point Bolt Kit. Designed for factory-style Chevrolet Big Block Mark IV cylinder head applications, this Big Block Chevy head bolt kit provides the clamping force and durability needed to help maintain reliable head gasket sealing in street, performance, marine, and racing engines. Whether you're rebuilding a 396, 402, 427, or 454 Big Block Chevy, these BBC cylinder head bolts provide dependable fastening performance.

Reliable Cylinder Head Clamping Force
Designed to securely fasten cylinder heads to the engine block, this BBC head bolt kit helps maintain consistent cylinder head clamping force and dependable head gasket retention. Ideal for engine rebuilds, cylinder head replacement, and performance engine assembly projects.

High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, these Big Block Chevy cylinder head bolts are built to withstand demanding engine conditions. Threads are rolled after heat treatment and protected with a black oxide finish and oil coating for enhanced durability and corrosion resistance.

Designed for Original Big Block Chevy Cylinder Heads
Engine-specific design provides compatibility with factory-style Chevrolet Big Block Mark IV cylinder head applications, including many 396, 402, 427, and 454 engine combinations. These BBC head bolts are ideal for stock replacement, engine rebuilds, cylinder head service, and performance applications requiring dependable cylinder head hardware.

Ideal for Rebuilds & Performance Engine Builds
Perfect for cylinder head installation, head gasket replacement, engine assembly, and high-performance engine projects where fresh Big Block Chevy cylinder head hardware is recommended. An excellent choice for maintaining proper head gasket sealing and long-term reliability in naturally aspirated, marine, street performance, and racing applications.

What engines does this head bolt kit fit?
This kit is designed for Chevrolet Big Block Mark IV engine applications using factory-style cylinder heads, including many 396, 402, 427, and 454 combinations.

Why replace cylinder head bolts during a rebuild?
Replacing cylinder head hardware helps ensure proper clamping force, reliable head gasket sealing, and long-term durability during engine assembly or cylinder head service.

What is the benefit of a 12-point head design?
The 12-point head design provides improved socket engagement and helps achieve accurate torque readings during installation.

Are these suitable for performance applications?
Yes. The bolts are manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI for demanding street, marine, and racing use.

What material are the bolts made from?
The kit is manufactured from 35 chromoly steel and features rolled threads, a black oxide finish, and a corrosion-resistant oil coating.

Can these be used with aftermarket cylinder heads?
This kit is designed for factory-style Big Block Chevy cylinder head applications. Verify cylinder head compatibility before ordering if using aftermarket heads.

Do head bolts affect head gasket sealing?
Properly installed cylinder head bolts help maintain consistent clamping force between the cylinder head and engine block, supporting reliable head gasket sealing.

Can these be used during a complete engine rebuild?
Yes. This BBC head bolt kit is ideal for engine rebuilds, cylinder head service, head gasket replacement, and performance engine assembly projects.