YZQPNB LS-Series Head Stud Bolt Kit for 2004–2019 LS1/LS3 Engines — Black Oxide 12‑Point

YZQPNB 12-Point Head Stud Bolt Kit is a complete replacement stud set engineered to restore secure, even clamping for 2004–2019 GM LS series 4.8L–6.0L engines.

When you need to replace cylinder head fastening hardware on Chevy LS-series engines, this YZQPNB kit supplies the studs, 12-point nuts, and parallel-ground washers required to rebuild reliable head clamping. The set matches the fit of the factory geometry (replaces part 234-4317) and is produced from 8740 chromoly steel with a black oxide finish for corrosion resistance and strength. It’s intended for engine builds, head swaps, or any service that requires renewing head fasteners on compatible LS applications.

Will this kit fit my 2004–2019 LS engine?

Yes—this kit covers a broad range of GM LS small-block engines made from 2004 onward. It is compatible with LS1/LS3 families plus common 4.8L, 5.3L, 5.7L and 6.0L variants used across many Chevy models.

• Compatible engines: LS1, LS3, LS6, L98 and other 2004–2019 4.8L, 5.3L, 5.7L, 6.0L engines.
• Direct replacement for part number 234-4317 (non-OEM aftermarket equivalent).
• Intended for vehicles with bolt pattern and stud requirements matching original GM head hardware.

What parts are included and how are they finished?

The kit contains the complete fastening components needed per cylinder head and is finish-treated for durability. Everything is manufactured to deliver consistent torque readings and uniform load distribution when installed correctly.

• Contents: 10 M8 studs, 20 M11 head studs, 30 parallel-ground washers, 30 12-point nuts.
• Material: 8740 chromoly high-tensile steel for enhanced strength and fatigue resistance.
• Finish: black oxide surface treatment to help resist corrosion and provide a low-friction installation surface.

How does this kit affect installation and torque accuracy?

The included parallel-ground washers and 12-point nuts are supplied to promote even clamping and accurate torque readings—important for head gasket sealing and cylinder head alignment. Using the correct washers and studs reduces the risk of uneven preload and improves repeatability during torque sequence procedures.

• Parallel-ground washers ensure flat seating and even load spread under the nut.
• 12-point nuts allow easier access in tight head-bolt pattern areas and precise torque application.
• Studs hardened and machined for consistent thread engagement and reduced galling.

What quality checks and support does YZQPNB provide?

YZQPNB performs dimensional and material quality control on the stud sets and offers customer support for fitment or part questions. While this is an aftermarket replacement, the kit is produced under strict test standards to minimize installation failures.

• Manufactured to tensile/hardness standards suitable for head-stud applications.
• Each kit includes washers and nuts to reduce the chance of uneven torque or preload loss.
• Customer support available for compatibility or installation inquiries.

Who is this kit for? This YZQPNB head stud bolt kit is designed for mechanics, engine builders, and DIY enthusiasts rebuilding or repairing 2004–2019 Chevy LS-series engines who need a complete, high-strength replacement fastening set. Choose this kit when replacing worn or corroded head hardware, performing cylinder head servicing, or completing a head swap where OEM part 234-4317 is required but a direct aftermarket replacement is acceptable. It is not an OEM part but is engineered to match fitment and function for confident reassembly when installed per factory torque procedures.