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

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.

COMPATIBLE WITH
GM LS & LSX SERIES V8 ENGINES
• 4.8 L / 293 in³ (LR4, LY2, L20)
• 5.3 L / 325 in³ (LM7, L59, LM4, L33, LC9, LH6, LY5, LMG)
• 5.7 L / 346 in³ (LS1, LS6)
• 6.0 L / 364 in³ (LQ4, LQ9, LS2, L76, LY6, L96)
• 6.2 L / 376 in³ (LS3, L92, L99, L9H)
• 7.0 L / 427-428 in³ (LS7, LSX applications)

COMMON USES
• Engine Rebuilds
• Stroker Engine Builds
• Rotating Assembly Upgrades
• Forced Induction Applications
• Performance Street Engines
• Drag Racing Builds
• Circle Track Engines
• High-Horsepower LS & LSX Builds

NOTES
• Designed for compatible LS and LSX main cap applications.
• Verify block configuration before ordering.
• Not intended for non-LS engine platforms.

SPECIFICATIONS
Torque: 2 steps to 60ft-lbs studs 25ft-lbs side bolts
Color: Black
Fastener Style: Stud
Grade: Performance
Head Style: 12-point
Material: 35 Chromoly Steel
Quantity: Sold as a kit