PQY Cylinder Head Studs & Bolts Kit for Chevy 1997–2003 5.3L/6.0L — Heat‑Treated Black Oxide, Direct Fit

PQY Cylinder LS Head Studs Bolts Kit is a direct-fit 12-point head stud and bolt replacement engineered for Chevy LS engines from 1997–2003 to restore clamping strength and durability.

This kit supplies everything needed to replace corroded or worn cylinder head fasteners on popular GM platforms—including Camaro/Firebird F-Body, C5 Corvette, and Silverado/Sierra trucks—matching the factory form and improving long-term reliability. The studs are centerless-ground, heat-treated, and finished in black oxide for corrosion resistance and high-temperature performance, while the included nuts and washers simplify installation. Below you’ll find clear answers to the most common buyer questions about fitment, torque, material, and installation details.

Will this kit fit my Chevy 5.3L or 6.0L from 1997–2003?

Yes — the PQY kit is made specifically to fit LS-series applications from those model years. It is compatible with 98–02 Camaro/Firebird F-Body, 97–03 C5 Corvette, and 99–03 Silverado/Sierra trucks with 4.8L, 5.3L, or 6.0L engines.

• Direct replacement geometry for factory head bolt locations.
• Supplied stud and nut counts match cylinder head requirements.
• Works for F-Body, C5 Corvette, and GM truck LS engines listed.

How strong are these PQY head studs and what are the recommended torques?

The studs are heat-treated and centerless-ground to achieve a high tensile capacity and consistent threads for secure clamping. PQY rates the studs around 220,000 psi tensile strength, offering a robust option for street and light-performance use.

• M11 head studs: tighten to approximately 80 ft·lb for final torque.
• M8 head studs: tighten to approximately 28 ft·lb for final torque.
• Use a calibrated torque wrench and follow factory torque sequence for best results.

What materials and finishes are used, and why do they matter?

The kit’s studs and bolts are manufactured from ductile iron and finished with a black oxide coating to resist corrosion and endure elevated under-hood temperatures. These choices balance strength, fatigue resistance, and longevity in typical driving conditions.

• Iron construction provides good ductility and toughness.
• Black oxide resists rust and reduces galling on threads.
• Heat-treated and thread-rolled for consistent tensile performance.

How straightforward is installation and what does the kit include?

Installation is intended to be a direct replacement for worn or rusted factory fasteners and can be completed with standard tools by anyone comfortable with head removal or replacement procedures. The kit comes with all necessary studs, nuts, and washers so you won’t need to source additional pieces.

• Contents: 20 × M11 head studs, 10 × M8 head studs, 30 × parallel-ground washers, 30 × 12-point nuts.
• Direct-replace design—no modifications required for compatible engines.
• If any part is missing, contact PQY customer support for assistance.

Who is this for: The PQY Cylinder LS Head Studs Bolts Kit is aimed at mechanics, DIY enthusiasts, and restorers working on late-90s to early-2000s GM LS engines who need a reliable, OEM-style fastener replacement. It’s ideal for vehicles with corroded or fatigued head bolts, engines undergoing head service, or builds where dependable clamping is a priority without moving to specialty race hardware.