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Mr. Gasket Thermostat - 180 Degree

Fits 2004-2008 GM LS2/LS3/LS6/LS7 and 1997-2003 LS Engines when using Mr. Gasket Water Necks 2670, 2671, and 2672.

PART# 6368

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Designed to open at 180 degrees every time, regardless of engine rpm, and it's high-flow design and brass and copper construction eliminate the damaging effects of cycling when you're stuck in stop-and-go traffic. It includes the rubber gasket and has a pressure relief valve.


  • Opens sooner than stock at 180 degrees
  • High flow design for performance applications
  • Includes rubber o-ring seal/gasket
  • Incorporates pressure relief valve


BrandMr. Gasket
Emission Code5
Product TypeThermostats
WarrantyLimited 90 Day
Part Number6368



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.

Tech Resources

This thermostat is compatible with most 2004-2008 LS based engines except for 2007-up new chassis CK trucks and SUVs which had a new design water pump that uses a slightly taller thermostat. You can identify the new style thermostat by gasket diameter of 2.34 inch, the earlier style is 2.28 inch.

Warranty Information

Limited 90 Day: See Details


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