160° Mishimoto Racing Thermostat [GT & GXP]

  • Direct fit for you Pontiac G8
  • Opens at a lower temperature (160° F), allowing sooner coolant release, reducing engine temps.
  • High Quality seal for leak-free installation
  • Promotes greater cooling efficiency by significantly decreasing high engine temps.
  • Digitally calibrated for precise, consistent operation
  • Lifetime Manufacturer’s Warranty

160° Mishimoto Racing Thermostat [GT & GXP]

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$68.95

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Est. Ship By Mon, Sep 21

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A stock or modified LS engine demands a reliable and efficient cooling system to keep your car on the road and out of the shop. The Mishimoto racing thermostat is an easy upgrade for both performance and reliability. The Mishimoto Racing Thermostat is precision engineered to provide your vehicle with optimal cooling efficiency even in the most demanding environments.

Mishimoto racing thermostats promote greater cooling efficiency by significantly decreasing high engine temperatures. Once the engine is fully warmed up, the Mishimoto racing thermostat will open at a lower temperature (160°F) compared to standard thermostats (186°F). This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Mishimoto thermostats are digitally calibrated, utilize high-quality wax to ensure precise and consistent opening temperatures, and include a gasket for seamless, leak-free installation. As with all our products, this racing thermostat is guaranteed by the Mishimoto Lifetime Warranty

Year

08 & Early 09, 09.5

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160° Mishimoto Racing Thermostat [GT & GXP] 160° Mishimoto Racing Thermostat [GT & GXP]
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Will this fit on my 9.5 G8 Ej Bernal asked on June 30, 2026

You can choose from the dropdown if you have an 09 or 09.5. Be sure to order the correct one, the 09.5 and the GXP both share the LS3 style thermostat. If you are unsure, check the last 7 digits of your VIN number. If it starts with an "L" (ei. L _ _ _ _ _ _) it is an 09.5.

jlabruzza answered on July 1, 2026 store manager
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160° Mishimoto Racing Thermostat [GT & GXP]
$68.95