The Audi S4/A4/A6 is a well-balanced vehicle that demands a reliable and efficient cooling system to perform at its best.Keep your Audi on the road and out of the shop by upgrading to the Mishimoto racing thermostat.This thermostat promotes greater cooling efficiency by significantly decreasing high engine temperatures.Once the engine is fully warmed up, the Mishimoto low-temperature racing thermostat will open at a lower temperature (160 F) compared to standard thermostats (189 F).This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures.As with all our products, this thermostat includes the Mishimoto lifetime warranty. Mishimoto Audi S4/A4/A6 Racing Thermostat MMTS-S4-00L 1994-1995 Audi 90 2.8 Liter 012, 1994-1995 Audi 90 2.8 Liter 012, 1994-1995 Audi 90 2.8 Liter 01N, 1994-1995 Audi 90 2.8 Liter 01N, 1994-1995 Audi 90 2.8 Liter 097, 1994-1995 Audi 90 2.8 Liter 097, 1993-1995 Audi 90 Quattro 2.8 Liter 01A, 1993-1995 Audi 90 Quattro 2.8 Liter 01A, 1996-2000 Audi A4 2.8 Liter 012, 1996-2000 Audi A4 2.8 Liter 012, 1996-2000 Audi A4 2.8 Liter 01V, 1996-2000 Audi A4 2.8 Liter 01V, 1996-2000 Audi A4 Quattro 2.8 Liter 01A, 1996-2000 Audi A4 Quattro 2.8 Liter 01A, 1996-2000 Audi A4 Quattro 2.8 Liter 01V, 1996-2000 Audi A4 Quattro 2.8 Liter 01V, 1995 Audi A6 2.8 Liter 012, 1995 Audi A6 2.8 Liter 012, 1995-1997 Audi A6 2.8 Liter 01K, 1995-1997 Audi A6 2.8 Liter 01K, 1998-2001 Audi A6 2.8 Liter 01V, 1998-2001 Audi A6 2.8 Liter 01V, 2000-2001 Audi A6 Quattro 2.7 Liter 01A, 2000-2004 Audi A6 Quattro 2.7 Liter 01E, 2002-2004 Audi A6 Quattro 2.7 Liter 01L, 2000-2001 Audi A6 Quattro 2.7 Liter 01V, 1995 Audi A6 Quattro 2.8 Liter 01A, 2000-2001 Audi A6 Quattro 2.8 Liter 01A, 1995 Audi A6 Quattro 2.8 Liter 01A, 2000-2001 Audi A6 Quattro 2.8 Liter 01A, 2000-2001 Audi A6 Quattro 2.8 Liter 01E, 1995-1998 Audi A6 Quattro 2.8 Liter 01F, 1998-2001 Audi A6 Quattro 2.8 Liter 01V, 1998-2001 Audi A6 Quattro 2.8 Liter 01V, 2000-2001 Audi A6 Quattro 4.2 Liter 01A, 2000-2004 Audi A6 Quattro 4.2 Liter 01E, 2002-2004 Audi A6 Quattro 4.2 Liter 01L, 2000-2001 Audi A6 Quattro 4.2 Liter 01V, 1997-1999 Audi A8 3.7 Liter 01V, 1997-1999 Audi A8 Quattro 4.2 Liter 01L, 2001-2005 Audi Allroad Quattro 2.7 Liter 01V, 2004-2005 Audi Allroad Quattro 4.2 Liter 01V, 1994-1998 Audi Cabriolet 2.8 Liter 097, 1994-1998 Audi Cabriolet 2.8 Liter 097, 2000-2002 Audi S4 2.7 Liter 01E, 2000-2002 Audi S4 2.7 Liter 01V, 2004-2005 Audi S4 4.2 Liter 01E, 2004-2006 Audi S4 4.2 Liter 09L, 2006 Audi S4 4.2 Liter 0A3, 2001-2003 Audi S8 4.2 Liter 01L, 1990-1991 Audi V8 Quattro 3.6 Liter 016, 1990-1991 Audi V8 Quattro 3.6 Liter 018 ...See Application Guide for Additional Fitments