Mishimoto 180° Racing Thermostat — Fits 99-05 VW GTI 1.8T

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SKU: MISMMTS-GTI-99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Mishimoto 180° Racing Thermostat for 1999-2005 Volkswagen GTI 1.8T

Upgrade your 1999-2005 Volkswagen GTI 1.8T's cooling system with the Mishimoto 180° Racing Thermostat. This performance thermostat is designed to help maintain optimal engine temperatures, especially crucial for turbocharged engines that generate significant heat. By opening at a lower temperature than the stock unit, it allows coolant to circulate more freely, enhancing the efficiency of your radiator and overall cooling system.

Key Features and Benefits:

  • Lower Opening Temperature: The 180°F (approx. 82°C) opening point helps keep your turbocharged 1.8T engine running cooler.
  • Improved Cooling Efficiency: Facilitates better heat dissipation by allowing coolant to flow to the radiator sooner.
  • Direct Fit Replacement: Engineered for a precise fit in 1999-2005 Volkswagen GTI models with the 1.8T engine.
  • Enhanced Performance: Helps prevent heat soak and maintain consistent power output, especially during spirited driving or track use.
  • Durable Construction: Built to Mishimoto's high standards for reliability and longevity.

This Mishimoto racing thermostat is an excellent addition for GTI owners looking to improve their engine's thermal management. Whether you've upgraded your turbocharger, intercooler, or simply want to ensure your engine performs at its peak, this thermostat plays a vital role. Pair it with other Mishimoto cooling components for a complete performance cooling package. Trust Mishimoto for quality parts that enhance your driving experience.

Vehicle Fitment

Years Make Model Trim
1997-2001 Audi A4 Base
2003-2006 Audi TT Base
1998 Volkswagen Beetle Base
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GL
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
1998 Volkswagen Golf K2
1999 Volkswagen Golf Wolfsburg Edition
1999-2005 Volkswagen Golf GLS
2000-2001 Volkswagen Golf GTI GLS
2002-2005 Volkswagen Golf GTI 1.8T
1998 Volkswagen Jetta K2
1998-1999 Volkswagen Jetta Wolfsburg Edition
1998-2005 Volkswagen Jetta GL
1998-2005 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2005 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GL TDI
2004-2005 Volkswagen Passat GLS TDI

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Mishimoto 180° Racing Thermostat for 1999-2005 Volkswagen GTI 1.8T

Upgrade your 1999-2005 Volkswagen GTI 1.8T's cooling system with the Mishimoto 180° Racing Thermostat. This performance thermostat is designed to help maintain optimal engine temperatures, especially crucial for turbocharged engines that generate significant heat. By opening at a lower temperature than the stock unit, it allows coolant to circulate more freely, enhancing the efficiency of your radiator and overall cooling system.

Key Features and Benefits:

  • Lower Opening Temperature: The 180°F (approx. 82°C) opening point helps keep your turbocharged 1.8T engine running cooler.
  • Improved Cooling Efficiency: Facilitates better heat dissipation by allowing coolant to flow to the radiator sooner.
  • Direct Fit Replacement: Engineered for a precise fit in 1999-2005 Volkswagen GTI models with the 1.8T engine.
  • Enhanced Performance: Helps prevent heat soak and maintain consistent power output, especially during spirited driving or track use.
  • Durable Construction: Built to Mishimoto's high standards for reliability and longevity.

This Mishimoto racing thermostat is an excellent addition for GTI owners looking to improve their engine's thermal management. Whether you've upgraded your turbocharger, intercooler, or simply want to ensure your engine performs at its peak, this thermostat plays a vital role. Pair it with other Mishimoto cooling components for a complete performance cooling package. Trust Mishimoto for quality parts that enhance your driving experience.

Vehicle Fitment

Years Make Model Trim
1997-2001 Audi A4 Base
2003-2006 Audi TT Base
1998 Volkswagen Beetle Base
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GL
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
1998 Volkswagen Golf K2
1999 Volkswagen Golf Wolfsburg Edition
1999-2005 Volkswagen Golf GLS
2000-2001 Volkswagen Golf GTI GLS
2002-2005 Volkswagen Golf GTI 1.8T
1998 Volkswagen Jetta K2
1998-1999 Volkswagen Jetta Wolfsburg Edition
1998-2005 Volkswagen Jetta GL
1998-2005 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2005 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GL TDI
2004-2005 Volkswagen Passat GLS TDI

Product Details

Product Description

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Mishimoto 180° Racing Thermostat for 1999-2005 Volkswagen GTI 1.8T

Upgrade your 1999-2005 Volkswagen GTI 1.8T's cooling system with the Mishimoto 180° Racing Thermostat. This performance thermostat is designed to help maintain optimal engine temperatures, especially crucial for turbocharged engines that generate significant heat. By opening at a lower temperature than the stock unit, it allows coolant to circulate more freely, enhancing the efficiency of your radiator and overall cooling system.

Key Features and Benefits:

  • Lower Opening Temperature: The 180°F (approx. 82°C) opening point helps keep your turbocharged 1.8T engine running cooler.
  • Improved Cooling Efficiency: Facilitates better heat dissipation by allowing coolant to flow to the radiator sooner.
  • Direct Fit Replacement: Engineered for a precise fit in 1999-2005 Volkswagen GTI models with the 1.8T engine.
  • Enhanced Performance: Helps prevent heat soak and maintain consistent power output, especially during spirited driving or track use.
  • Durable Construction: Built to Mishimoto's high standards for reliability and longevity.

This Mishimoto racing thermostat is an excellent addition for GTI owners looking to improve their engine's thermal management. Whether you've upgraded your turbocharger, intercooler, or simply want to ensure your engine performs at its peak, this thermostat plays a vital role. Pair it with other Mishimoto cooling components for a complete performance cooling package. Trust Mishimoto for quality parts that enhance your driving experience.

Vehicle Fitment

Years Make Model Trim
1997-2001 Audi A4 Base
2003-2006 Audi TT Base
1998 Volkswagen Beetle Base
1999-2004 Volkswagen Beetle GLX
1999-2005 Volkswagen Beetle GL
1999-2005 Volkswagen Beetle GLS
2001-2002 Volkswagen Beetle Sport
2002-2004 Volkswagen Beetle Turbo S
1998 Volkswagen Golf K2
1999 Volkswagen Golf Wolfsburg Edition
1999-2005 Volkswagen Golf GLS
2000-2001 Volkswagen Golf GTI GLS
2002-2005 Volkswagen Golf GTI 1.8T
1998 Volkswagen Jetta K2
1998-1999 Volkswagen Jetta Wolfsburg Edition
1998-2005 Volkswagen Jetta GL
1998-2005 Volkswagen Jetta GLS
2001 Volkswagen Jetta Wolfsburg Edition
2003 Volkswagen Jetta Wolfsburg Edition
2005 Volkswagen Jetta GLI
1998-2005 Volkswagen Passat GLS
2003-2005 Volkswagen Passat GL
2004-2005 Volkswagen Passat GL TDI
2004-2005 Volkswagen Passat GLS TDI

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