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Mishimoto 180° Racing Thermostat for 87-06 Jeep® Wrangler YJ, TJ with 2.5L, 4.0L or 4.2L

The Quadratec® Difference
Catalog #: 51209.2000
Mishimoto Part #: MMTSWRA87L
Mishimoto is proud to offer a racing thermostat specifically designed for the 1987-2006 Jeep Wrangler YJ/TJ. Whether you are cruising down the highway or climbing over boulders, an effective cooling system is extremely critical. Mishimoto racing thermostats promote 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 (180°F) compared to standard thermostats (195°F). This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Decreased temperatures will result in reduced engine wear and improved reliability. As with all our products, this thermostat includes the Mishimoto lifetime warranty.
Installation Notes
Installation Difficulty:
Level 2Intermediate
Parts Included


  • Engine Size: 2.5L I-4, 4.0L I-6, 4.2L 258ci I-6
  • Engine Fuel: Gasoline
  • Jeep Wrangler (TJ)

  • 2006 Jeep Wrangler (TJ)
  • 2005 Jeep Wrangler (TJ)
  • 2004 Jeep Wrangler (TJ)
  • 2003 Jeep Wrangler (TJ)
  • 2002 Jeep Wrangler (TJ)
  • 2001 Jeep Wrangler (TJ)
  • 2000 Jeep Wrangler (TJ)
  • 1999 Jeep Wrangler (TJ)
  • 1998 Jeep Wrangler (TJ)
  • 1997 Jeep Wrangler (TJ)
  • Jeep Wrangler Unlimited (TJ)

  • 2006 Jeep Wrangler Unlimited (TJ)
  • 2005 Jeep Wrangler Unlimited (TJ)
  • 2004 Jeep Wrangler Unlimited (TJ)
  • Jeep Wrangler (YJ)

  • 1995 Jeep Wrangler (YJ)
  • 1994 Jeep Wrangler (YJ)
  • 1993 Jeep Wrangler (YJ)
  • 1992 Jeep Wrangler (YJ)
  • 1991 Jeep Wrangler (YJ)
  • 1990 Jeep Wrangler (YJ)
  • 1989 Jeep Wrangler (YJ)
  • 1988 Jeep Wrangler (YJ)
  • 1987 Jeep Wrangler (YJ)
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