YZQPNB 12-Point Head Stud Bolt Kit for 2004–2019 Chevy LS Engines — 8740 Chromoly, Black Oxide Finish

YZQPNB 12-Point Head Stud Bolt Kit is a complete replacement cylinder head stud set engineered for 2004–2019 LS-family 4.8L–6.0L engines, providing hardened chromoly studs, 12-point nuts and ground washers for consistent clamping and torque accuracy. The YZQPNB kit is a direct-fit replacement for worn or damaged head fasteners on many Chevy LS engines from 2004 onward. Manufactured from 8740 chromoly steel with a black oxide finish, this set replaces part 234-4317 and includes studs, nuts and parallel-ground washers sized for reliable load distribution. It’s offered as an aftermarket alternative to OEM hardware for engine rebuilds, head swaps and high-mileage maintenance.

Will this head stud kit fit my 2004–2019 LS engine?

The kit is designed to be compatible with a wide range of GM LS-family engines from model years 2004 through 2019, including LS1, LS3 and common 4.8L, 5.3L, 5.7L, 6.0L variants. Confirm fitment by cross-referencing your engine code and the original part number it replaces.

• Compatible engine families: LS1, LS3 and 2004–2019 Chevy LS V8 variants.
• Common compatible displacements: 4.8L, 5.3L, 5.7L, 6.0L.
• Replaces part number 234-4317 as a direct aftermarket option.
• Verify vehicle-specific fit using engine ID and head bolt pattern.

How is the YZQPNB kit constructed for durability?

Components are manufactured from high-tensile 8740 chromoly steel and undergo quality controls to ensure consistent material strength. Studs are finished in black oxide to resist corrosion and the included parallel-ground washers ensure even clamp loads and accurate torque readings during installation.

• 8740 chromoly construction for high tensile strength and fatigue resistance.
• Black oxide surface treatment for corrosion resistance and reduced galling.
• Parallel-ground washers to prevent uneven loading and torque drift.
• 12-point nuts sized for secure, consistent tightening in confined engine spaces.

What does the kit include and how many pieces will I receive?

The box contains every fastener needed for a complete cylinder head installation on a V8: multiple studs, nuts and matching ground washers to replace factory head bolts. Each piece is supplied in the quantities required for two cylinder heads on a V8 engine.

• 10 × M8 studs for accessory or special locations.
• 20 × M11 head studs sized for each head’s bolt pattern.
• 30 × parallel-ground washers to ensure uniform load distribution.
• 30 × 12-point nuts for secure, repeatable torqueing.

Who is this for This YZQPNB head stud bolt kit is intended for mechanics, engine builders and DIY enthusiasts performing head gasket replacements, cylinder head swaps or full engine rebuilds on Chevy LS-family V8 engines from 2004–2019. Choose this kit if you need a robust, cost-effective aftermarket replacement for part 234-4317, want hardened chromoly hardware, and require washers and 12-point nuts matched for consistent torqueing and long-term reliability. For any compatibility questions or post-sale support, contact the seller so issues can be resolved before installation.

FAQ

Q: Does this kit replace OEM part 234-4317?

A: Yes, the YZQPNB kit is a direct aftermarket replacement for part 234-4317, designed to fit the same LS head bolt pattern.

Q: Are washers and nuts included for both heads on a V8?

A: Yes — the package includes studs, 12-point nuts and 30 parallel-ground washers, enough for both cylinder heads on typical V8 engines.