Pro Series GM Gen III/IV LS and LSX Main Stud Kit

• Fits LS & LSX Engine Applications: Designed for GM Gen III/IV LS and LSX main cap applications.

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

• Improved Main Cap Retention: Provides consistent clamping force for demanding engine builds.

• Ideal for Rebuilds & Racing Applications: Perfect for engine assembly, stroker builds, and performance projects.

Strengthen the foundation of your engine with the Top Street Performance Pro Series LS & LSX Main Stud Kit. Designed for GM Gen III and Gen IV LS and LSX engine applications, this LS main stud kit provides the strength and clamping force needed to help maintain secure main bearing cap retention in street, performance, racing, and high-horsepower engine builds. Whether you're assembling a fresh engine, upgrading your bottom end, or completing a rebuild, these LS main studs deliver dependable performance under demanding conditions.

Secure Main Bearing Cap Retention
Designed to replace factory main cap bolts, these LS main cap studs help provide consistent clamping force and secure main bearing cap retention. Ideal for engine rebuilds, stroker combinations, performance builds, and rotating assembly upgrades requiring dependable LS main bearing cap studs.

High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, this LSX main stud kit is engineered for durability and long-term reliability. Threads are rolled after heat treatment and protected with a black oxide finish and oil coating to help resist corrosion and wear.

Designed for LS & LSX Engine Applications
Engine-specific design provides compatibility with GM Gen III and Gen IV LS and LSX engine platforms. These LS engine main studs are ideal for stock replacement, performance builds, engine rebuilds, and applications requiring upgraded LS block hardware.

Ideal for Rebuilds & High-Performance Builds
Perfect for engine assembly, rotating assembly service, stroker builds, forced induction combinations, and racing applications where fresh LS bottom end hardware is recommended. An excellent choice for maintaining secure main cap retention in demanding performance environments.

What does this main stud kit fit?
This kit is designed for GM Gen III and Gen IV LS and LSX engine applications requiring main bearing cap stud hardware.

What is a main stud kit?
A main stud kit replaces factory main cap bolts with high-strength studs, nuts, and washers that secure the crankshaft main bearing caps to the engine block.

Why use main studs instead of main bolts?
Main studs can provide more consistent clamping force and improved fastener engagement within the engine block, making them popular for performance, racing, and high-horsepower engine builds.

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

What material are the studs made from?
The hardware is manufactured from premium 35 chromoly steel and features rolled threads, a black oxide finish, and protective oil coating for durability and corrosion resistance.

Can these be used in forced induction applications?
Yes. These LS main studs are well suited for naturally aspirated, nitrous, turbocharged, and supercharged engine combinations where increased bottom-end strength is desired.

Do main studs require line honing?
Many engine builders recommend checking or correcting main bore alignment when switching from main bolts to main studs. Consult your engine machinist for application-specific recommendations.

Why upgrade LS bottom-end hardware?
Upgraded LS main cap studs help provide secure main bearing cap retention and consistent clamping force, which can be beneficial in high-performance and racing applications.