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3V Performance Modified Small Bore LS MLS Head Gasket — 3.945" Bore / .050" Thickness STR-346-4031
3V Performance / Cylinder Head Gaskets

3V Performance Modified Small Bore LS MLS Head Gasket — 3.945" Bore / .050" Thickness STR-346-4031

$45.00
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Modified LS MLS Head Gasket — 3.945" Bore / .050" Thickness

Gen III/IV LS Performance Head Gasket(Big Bore)

LS Large Bore MLS Head gasket  3.945" bore x .050" Coated (Each)

Designed for Gen III and Gen IV LS engines, these modified head gaskets feature seven enlarged coolant passages to promote coolant circulation around the cylinders. The modifications are intended to reduce localized heat buildup and support more consistent temperatures during demanding performance use.

Managing heat around the cylinders and combustion chambers helps support consistent engine performance under sustained load. These gaskets focus on improving coolant distribution, with actual results depending on the engine combination and cooling system.

Constructed from coated multi-layer steel (MLS), these gaskets provide durable sealing for performance applications. Their 3.945" bore opening and .050" compressed thickness accommodate compatible 4.8L,5.3L and 5.7L LS combinations.

  • Application: Gen III and Gen IV LS engines; verify compatibility with your block and cylinder heads

  • Maximum cylinder bore: 3.945"

  • Compressed thickness: .050"

  • Construction: Coated multi-layer steel

  • Cooling modification: Seven enlarged coolant passages

  • Quantity: One gasket; order two for a complete engine

  • For off-road use only

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