Intake Manifold Gasket Set -GM LS1/LS6

Ultra Seal Intake Manifold Gasket Set

PART# 4668G

$32.66   Suggested Retail
$29.39   Your Price
Free Shipping on orders over $100*
In Stock  


Mr. Gasket 4668G, Intake Manifold Gaskets, Ultra-Seal III, Chevy LS1/LS6


  • Fits Cathedral Port Heads
  • Stock Port & Bolt Locations


BrandMr. Gasket
Emission Code1
EngineGM LS1/LS6
MaterialUltra-seal III
Port ShapeCathedral
Port Size1.15" x 3.40"
Product TypeIntake Gaskets
WarrantyLimited 90 Day Warranty


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

*Free Shipping & Handling only offered to the continental US on orders over $100.

Some parts are not legal for use in California or other states with similar regulations.