ACDelco Engine Cylinder Head Gasket Set

ACDelco Engine Cylinder Head Gasket Sets: OE-Grade Sealing for GM Engines

The cylinder head gasket is one of the most critically loaded components in any engine. It must contain all the heat and compression generated by the engine while simultaneously sealing the combustion chambers and coolant and oil passages between the cylinder head and the engine block. When that seal fails, the consequences range from coolant loss to catastrophic engine damage — which is precisely why choosing the right replacement gasket set matters so much. ACDelco has built its reputation in this category on one foundational principle: engineering gasket sets to the same standards as the parts that came off the factory line.

Multi-Layer Steel Technology Built for High-Output Engines

One of ACDelco's most important differentiators in the engine cylinder head gasket set category is its use of Multi-Layer Steel (MLS) construction. ACDelco uses Multi-Layered (MLS) gaskets on the majority of GM vehicles, providing spring-like performance where multiple layers seal the gaps when the head lifts from the block as cylinders fire — making them ideal for high-output engines where the higher the cylinder pressure, the greater the head-block separation. This design is a significant upgrade over older composite gaskets and is especially critical in modern, high-compression GM powerplants.

Three Tiers to Match Every Build and Budget

ACDelco structures its parts portfolio across three distinct product tiers, giving technicians and enthusiasts the right level of specification for their application. GM Genuine Parts and ACDelco Original Equipment are the true OE parts installed during production or validated by General Motors for GM vehicles, designed and engineered to meet rigorous standards set by General Motors. For those seeking a high-quality alternative, ACDelco Gold parts (formerly known as the "Professional" line) are the high-quality alternative to OE parts, built to meet the specific engineering requirements for most Chevrolet, Buick, GMC, and Cadillac vehicles, backed by GM. Rounding out the lineup, ACDelco Silver parts (formerly the "Advantage" line) are a quality, high-value option for most GM vehicles as well as most other makes and models.

Comprehensive Kits for Confident Repairs

ACDelco cylinder head gasket kits include the necessary parts to replace the engine cylinder head gasket, including the entire valve cover bolt assembly — minimizing the need to source supplementary hardware separately. Specific kit offerings like the HS006 and HS007 cover popular GM engine families including 4.8L and 5.3L LS-based platforms found in Chevrolet, GMC, Buick, Cadillac, and Isuzu applications. For diesel owners, ACDelco also produces graded cylinder head gasket sets for the 6.6L Duramax, available in multiple thickness grades to accommodate block deck surfacing during engine rebuilds.

Tested to Extreme Standards

ACDelco doesn't simply manufacture to OE dimensions — it validates those dimensions under punishing real-world conditions. ACDelco GM OE cylinder head gaskets must pass rigorous, long-term testing of high-torque, high-pressure loads in extreme temperatures, and are covered by a 12-months/unlimited-miles warranty. Many parts in the Professional/Gold line carry even broader coverage: most ACDelco OE and Professional lines are covered under a 24-Month/Unlimited Mile Warranty.

Whether you're overhauling a workhorse 5.3L truck engine, refreshing a performance LS build, or rebuilding a Duramax diesel, ACDelco's cylinder head gasket sets provide the OE-sourced confidence and engineered precision that the job demands. Browse the full selection of engine cylinder head gasket sets or explore everything ACDelco has to offer across the entire parts catalog.