ACDelco 12688943 GM Genuine Parts Multi-Layer Steel Cylinder Head Gasket

The ACDelco 12688943 is a GM Genuine Parts cylinder head gasket engineered for Gen V LT-series engines including LT1, LT2, L86, and L87 6.2L V8 powerplants. This gasket is designed, engineered, and tested to rigorous standards, and is backed by General Motors.

Key Features:

• Multi-layer steel (MLS) construction with 5 layers for superior sealing performance and durability
• 4.094-inch bore diameter and 0.052-inch thickness engineered to precise OEM specifications
• True OE parts installed during production or validated by General Motors for GM vehicles
• Spring-like multi-layer design compensates for head lift during combustion cycles
• Applications include 5.3L and 6.2L engines without supercharger
• Cross-references to OEM part numbers 12659260 and 12622331

This genuine GM replacement gasket delivers factory-original performance and reliability for critical engine sealing applications. The multi-layer steel construction provides exceptional durability under high cylinder pressures and temperatures while maintaining proper compression sealing throughout the engine's service life.