Mishimoto Nissan RB 155°F Racing Thermostat — Fits 84-93 Nissan 300ZX, 85-91 Maxima, 87-88 200SX

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SKU: MISMMTS-RB-ALLL

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Sale price$68.95 Regular price$76.00
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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.

Mishimoto 155°F Racing Thermostat for Nissan RB Engines

Enhance your Nissan's cooling system performance with the Mishimoto 155°F Racing Thermostat. Designed specifically for RB engines, this thermostat opens at a lower temperature than the stock unit, promoting more efficient coolant circulation and helping to prevent overheating, especially in high-performance or modified applications. Maintaining optimal engine temperatures is crucial for longevity and power output, and this thermostat is a simple yet effective way to achieve that.

Key Features and Benefits:

  • Lower Opening Temperature: Opens at 155°F (68°C) compared to the stock thermostat, allowing coolant to flow sooner.
  • Improved Cooling Efficiency: Reduces and maintains lower engine temperatures, crucial for performance and reliability.
  • Direct Fit Replacement: Engineered for a precise fit, ensuring easy installation without modifications.
  • Durable Construction: Built with high-quality materials to withstand the demands of performance driving.
  • Wide Nissan Fitment: Compatible with a range of Nissan models including the 300ZX (Z31, Z32), Maxima (A32, J30), and 200SX (S12). Also fits select Infiniti M30 and J30 models, and Mercury Villager.

Vehicle Compatibility:

This Mishimoto racing thermostat is designed to fit a variety of Nissan and Infiniti vehicles equipped with RB engines and compatible transmissions, including:

  • Nissan 300ZX: 1984-1996 (Various transmissions and engine codes)
  • Nissan Maxima: 1985-1994
  • Nissan 200SX: 1987-1988
  • Infiniti M30: 1990-1992
  • Infiniti J30: 1993-1997
  • Mercury Villager: 1993-2002 (3.0L & 3.3L)
  • Nissan Pathfinder: 1987-1995
  • Nissan Frontier: 1999-2003 (3.3L)
  • Infiniti QX4: 1997-2000 (3.3L)

Ensure optimal engine performance and longevity with this essential cooling upgrade from Mishimoto.

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.

Mishimoto 155°F Racing Thermostat for Nissan RB Engines

Enhance your Nissan's cooling system performance with the Mishimoto 155°F Racing Thermostat. Designed specifically for RB engines, this thermostat opens at a lower temperature than the stock unit, promoting more efficient coolant circulation and helping to prevent overheating, especially in high-performance or modified applications. Maintaining optimal engine temperatures is crucial for longevity and power output, and this thermostat is a simple yet effective way to achieve that.

Key Features and Benefits:

  • Lower Opening Temperature: Opens at 155°F (68°C) compared to the stock thermostat, allowing coolant to flow sooner.
  • Improved Cooling Efficiency: Reduces and maintains lower engine temperatures, crucial for performance and reliability.
  • Direct Fit Replacement: Engineered for a precise fit, ensuring easy installation without modifications.
  • Durable Construction: Built with high-quality materials to withstand the demands of performance driving.
  • Wide Nissan Fitment: Compatible with a range of Nissan models including the 300ZX (Z31, Z32), Maxima (A32, J30), and 200SX (S12). Also fits select Infiniti M30 and J30 models, and Mercury Villager.

Vehicle Compatibility:

This Mishimoto racing thermostat is designed to fit a variety of Nissan and Infiniti vehicles equipped with RB engines and compatible transmissions, including:

  • Nissan 300ZX: 1984-1996 (Various transmissions and engine codes)
  • Nissan Maxima: 1985-1994
  • Nissan 200SX: 1987-1988
  • Infiniti M30: 1990-1992
  • Infiniti J30: 1993-1997
  • Mercury Villager: 1993-2002 (3.0L & 3.3L)
  • Nissan Pathfinder: 1987-1995
  • Nissan Frontier: 1999-2003 (3.3L)
  • Infiniti QX4: 1997-2000 (3.3L)

Ensure optimal engine performance and longevity with this essential cooling upgrade from Mishimoto.

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