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Mr. Gasket MLS Head Gasket GM Small Block Gen III/IV (Ls Based) LS1/LS6 1997-2004

3.945" Bore - 0.040" Compressed Thickness (OE=0.051")

PART# 3148G

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"0.040"" compressed thickness which is 0.011"" thinner than OE to increase compression ratio.


ApplicationGM LS
BrandMr. Gasket
Compressed Thickness.040 inch
Compression RatioUp to 16:1
Emission Code5
EngineGM Small Block Gen III/IV (LS Based)
Gasket Bore3.945 inch
Gasket LineMLS
MaterialMulti-Layered Steel
Product TypeHead Gasket
Quantity Per Pkg.1
WarrantyLimited Lifetime Warranty
Part Number3148G


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Warranty Information

Limited Lifetime Warranty: See Details


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