ZONFANT 5.3L Cylinder Head Gasket Set with ES72220 Bolts Kit — MLS Gaskets & 30 Bolts for GM 2004–2014

This ZONFANT kit consolidates head gaskets, manifold gaskets, valve cover seals, timing-cover and oil-pan gaskets, valve stem seals, O-rings and small seals plus 30 ES72220 head bolts into one box so you can replace every critical seal in a 5.3L V8 in one service session. The multi-layered steel (MLS) head gaskets and OEM-spec fasteners are produced to tolerate combustion pressures and temperature cycling typical of GM-based 5.3L engines used across Chevrolet, GMC, Buick, Cadillac, Hummer, Isuzu and Saab platforms.

Which vehicles and engines will this kit fit?

This kit is tailored for GM 5.3L V8 and many related 4.3L/4.8L/5.3L applications across truck and SUV lines from 2004–2014. Check your model-year and engine code against the compatibility list before ordering to ensure fitment.

• Chevy: Avalanche, Colorado, Express, Silverado 1500, Suburban, Tahoe, Trailblazer, SSR (select years)
• GMC: Canyon, Envoy series, Savana, Sierra 1500, Yukon and Yukon XL (select years)
• Also fits: Buick Rainier, Cadillac Escalade (select years), Hummer H3/H3T, Isuzu Ascender, Saab 9-7x

What components are included and why are they important?

The kit supplies the full complement of gaskets and seals used when removing heads and performing a complete engine top-end service, so you won’t need to source additional pieces mid-job. Each component addresses a specific sealing surface to prevent coolant, oil and combustion gas leaks when reassembling the engine.

• MLS head gaskets — durable multi-layer construction for head-to-block sealing
• 30 ES72220 head bolts — new torque-to-yield bolts for proper clamp force
• Intake/exhaust manifold gaskets, valve cover gaskets, timing cover, oil pan gaskets
• Valve stem seals, O-rings and assorted small gaskets — complete ancillary sealing

How does this kit help during a rebuild or head service?

By combining all required gaskets and hardware in one package, the kit reduces downtime and the risk of missing a critical seal at reassembly. It also ensures you use fresh, matched components that meet OEM-style specifications for thickness, material and fit.

• One-stop purchase eliminates multiple orders and shipping delays
• Consistent material quality across gaskets helps achieve reliable sealing
• New head bolts included to restore correct clamping/torque sequence

What should I know about installation and support?

Standard engine disassembly and head-surface inspection are required before install; surfaces must be clean and flat. ZONFANT provides a 1-year support window for product issues and the kit ships new and test-checked, but follow factory torque and assembly procedures or consult a professional mechanic.

• Follow factory torque specs and sequence for ES72220 bolts (use torque/angle where specified)
• Inspect and machine head/block faces if warped or damaged
• Replace any additional worn components discovered during teardown

Who is this for: Professional technicians, DIY mechanics performing a head gasket repair or full top-end rebuild on GM 5.3L (and compatible 4.3L/4.8L) engines who prefer a single, comprehensive kit that includes MLS head gaskets and the required ES72220 head bolts. If you need every sealing component for a complete service without scavenging multiple sources, this kit is built for that workflow.