Performance Head Gasket Kit for Chevrolet Express (2004-2008) 4.8L 5.3L

Heavy-Duty Multi-Layer Steel Head Gasket Kit for 2004-2008 Chevrolet Express (GMT610)

What it Does: The Multi-Layer Steel Head Gasket Kit seals the cylinder head deck, oil passages, and coolant passages on the 2004-2008 Chevrolet Express to prevent combustion leaks and maintain factory cylinder compression.

The Stock Chevrolet Express Gasket Degradation

Under continuous commercial payload duty and severe heat cycling, OEM composite gaskets on the GMT610 platform suffer fire-ring deterioration and combustion flange distortion. High-mileage Vortec 4800 and Vortec 5300 cast-iron blocks with aluminum cylinder heads develop micro-fretting along the mating deck, resulting in external coolant weepage, combustion gas intrusion into the cooling jacket, and catastrophic cross-contamination of engine oil.

The Engineering Solution

This full overhaul kit features Multi-Layer Steel (MLS) head gaskets engineered with high-recovery spring steel layers coated in high-temperature Viton elastomer. This construction withstands extreme cylinder combustion pressures and accommodates head lift under heavy towing. Matched with molded fluoroelastomer valve stem seals, precision intake/exhaust manifold gaskets, and an elastomeric valley cover seal, this direct-fit overhaul restores critical deck sealing integrity across high thermal loads.

What's Included

• 2 Multi-Layer Steel (MLS) Head Gaskets
• 1 Rear Crankshaft Gasket Seal
• 1 Engine Oil Pan Gasket
• 1 Valley Cover Gasket
• Intake Manifold Gaskets
• Exhaust Manifold Gaskets
• Knock Sensor Grommets
• Damping Plug Heads
• Valve Stem Seals
• Fiber Base Plates
• Ancillary O-Rings and Hardware Gaskets

Technical Specifications

Compatibility

• 2004-2008 Chevrolet Express 1500 5.3L V8
• 2004-2008 Chevrolet Express 2500 4.8L / 5.3L V8
• 2004-2008 Chevrolet Express 3500 4.8L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT610 Express?

Yes, this is a direct fit for the 2004-2008 Chevrolet Express equipped with the 4.8L or 5.3L Gen III/IV Vortec small block V8 engine. Excludes 4.3L V6, 6.0L V8, and 6.6L Duramax diesel engine variants.

Are cylinder head bolts and piston rings included?

No, piston rings are not included in this gasket set, and new torque-to-yield (TTY) cylinder head bolts must be sourced separately for reassembly.

The Chevrolet Fleet Durability Standard

Engineered for high-demand commercial hauling and commercial fleet uptime, this full overhaul set provides the thermal and shear resilience required to keep high-GVWR Express vans operating leak-free under sustained towing loads.