PQY LS Head Studs Kit for Chevy 2004-2019 5.3L/6.0L — Heat-Treated 12-Point Studs with Black Oxide Finish

This kit supplies the hardware needed to restore clamp load reliability at the head-to-block joint, using centerless-ground, heat-treated studs rated to roughly 180k psi tensile strength. PQY designed the set for direct replacement of factory bolts on many LS1/LS3/LS6 and Vortec applications, offering corrosion-resistant black oxide finishes, parallel-ground washers and matched 12-point nuts to simplify installation and improve durability compared with old, rusted fasteners.

Will this kit fit my Chevy 5.3L or 6.0L from 2004–2019?

Yes — the PQY Cylinder LS Head Studs Bolts Kit is specified for 2004-and-newer LS-series engines including 4.8L, 5.3L and 6.0L variants. It replaces common factory part 234-4317 and fits many LS1, LS3, LS6 and Vortec blocks used across GM trucks and SUVs in that model range.

• Compatible engines: LS1/LS3/LS6 and Vortec 4.8L/5.3L/6.0L (2004–2019)
• Direct-replacement dimensions designed to match factory locations
• Replaces part number 234-4317 where applicable

How strong are these studs and what torque values should I use?

PQY head studs are centerless-ground and heat treated to deliver high tensile strength and predictable clamping performance. They’re nominally rated around 180k psi tensile, with manufacturer-recommended torque settings for consistent installation.

• M11 head studs: torque to 70 ft-lbs for secure clamping
• M8 studs: torque to 25 ft-lbs where specified
• Use supplied parallel-ground washers and 12-point nuts for even load distribution

What materials and finishes are used, and how do they handle heat and corrosion?

The kit uses high-ductility iron fasteners with a black oxide finish for basic corrosion resistance and improved high-temperature performance versus untreated hardware. The combination of the substrate and finish gives a balance of toughness and thermal stability appropriate for routine engine temperatures.

• Iron studs and nuts with black oxide finish for rust resistance
• Heat-treated and centerless-ground for dimensional accuracy
• Parallel-ground washers reduce distortion under load

What’s included in the PQY head stud kit and is installation difficult?

The kit contains all common pieces needed for a full head-stud conversion on an LS engine with straightforward, bolt-on replacement procedures. Installation is accessible for anyone comfortable with cylinder-head work and following torque sequence and specification guidelines.

• 10 × M8 studs, 20 × M11 studs
• 30 × parallel-ground washers and 30 × 12-point nuts
• Direct-replace design: swap out old bolts/studs during head reinstallation

Who is this for: The PQY Cylinder LS Head Studs Bolts Kit is aimed at technicians, home mechanics and performance enthusiasts rebuilding or refreshing 2004–2019 Chevy LS-series 4.8L/5.3L/6.0L cylinder heads. Choose this set if you need stronger, corrosion-resistant replacement fasteners that match factory fitment and provide reliable clamp force for routine street, tow, or mild performance use. If any components are missing from the box, contact PQY customer support for prompt assistance.