Cometic introduces Head Gasket for GM EcoTec3 Gen 5

Monday, August 04th, 2025

Cometic Gasket introduces the MLX Head Gasket for the GM LV1/LV3 EcoTec3 Gen 5 Engines. he Stopper MLX features active combustion and water/oil seals on outer layers, with a .006" thick fold-over "Stopper" layer to limit compression and enhance seal durability. A .060” cross-section increases stress resistance around the combustion chamber, boosting performance in demanding conditions.

• Active combustion seal located on the outer layers
• Center layer includes a "Stopper" seal with a fold-over design, typically .006” thick that limits full compression (yielding) of combustion seals
• Increases stress in a small (.060”) cross-section surrounding the combustion chamber
• Active water/oil seals positioned on the outer layers

GM LV1/LV3 EcoTec3

.054" MLX Cylinder Head Gasket, 4.000" Bore, RHS

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GM LV1/LV3 EcoTec3

.054" MLX Cylinder Head Gasket, 4.000" Bore, LHS

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