Mr Gasket 6368180 Degree ThermostatSpecification:Compatible Engines: 2004-2008 GM LS2/LS3/LS6/LS7 and 1997-2003 LS.Compatible Mr Gasket Water Necks: 2670, 2671, and 2672.Features:Opens sooner than stock at 180 degrees.High flow design for performance applications.Includes rubber o-ring seal/gasket.Incorporates pressure relief valve.Applications:Cadillac2004-2007 CTS2002-2007 Escalade2003-2007 Escalade ESV2002-2007 Escalade EXTChevrolet2002-2006 Avalanche 15001998-2002 Camaro2007-2007 Cheyenne1997-2008 Corvette2000-2007 TahoeAnd various other modelsGMC2005-2007 Envoy2003-2007 Savana 15001999-2007 Sierra 15002000-2007 Yukon2000-2007 Yukon XL 2500And various other modelsHummer2003-2007 H2Pontiac1998-2002 Firebird2008-2008 G82006-2007 Grand Prix2004-2006 GTO