PQY 12-Point Cylinder Head Stud Kit for Chevy LS Engines – LS1/LS3, 4.8L-6.0L (LS6/L98)

Overview

The PQY 12-Point Cylinder Head Stud Kit is built to refresh aging hardware on Chevy LS family engines. It is designed to work across multiple variants, including LS1, LS3, LS6 and L98, with displacements from 4.8L up to 6.0L and 5.3L/5.7L options. As a direct replacement for part number 234-4317, this kit supports 2004 and newer models, helping you maintain a solid seal and dependable clamping under a range of driving conditions.

Construction, strength, and finish

Crafted for reliability, the head studs are centerless ground and heat treated before thread rolling. This process yields robust components with a nominal 180K psi tensile strength, designed to resist fatigue during demanding use. The M11 studs carry a torque rating of 70 ft-lbs, while the M8 studs are rated at 25 ft-lbs, providing clear guidance for proper installation.

Made from iron with a protective black oxide finish, these fasteners combine ductility with high temperature resistance. The 12-point head design ensures secure seating and a confident bite even in tight or recessed locations. This kit emphasizes durability and consistency without adding extra complexity to your routine maintenance or upgrade.

Compatibility and use cases

Engineered to fit 2004-2019 Chevy LS models, including LS1, LS3 and performance-ready variants, the kit is a versatile upgrade for both routine service and trail or track-ready builds. Whether you are replacing worn studs after long mileage, rebuilding for a higher-stress application, or simply restoring factory reliability, this kit is designed to help maintain sealing integrity and steady clamping across a range of driving styles.

Installation advantages

The 12-point cylinder gasket head stud bolts are designed for straightforward installation, allowing a direct replacement of older rusted hardware. They help you refresh your engine's head-stud setup with components that are meant to endure heat and vibration while maintaining a clean, uniform seating surface.

What’s included

• 10x M8 Studs
• 20x M11 Head Studs
• 30x Parallel-ground Washers
• 30x 12-Point Nuts

If any part is missing on arrival, the seller offers support to help complete the set. This kit provides a comprehensive replacement solution for a balanced head-stud system on LS engines.

Notes and guidance

• Part number reference: 234-4317
• Material and finish emphasize high-temperature stability and corrosion resistance
• Exact torque values are recommended for each stud size to prevent over-tightening