Mishimoto 155F Thermostat - 1ZZ 2ZZ 2GR 2ZR

Mishimoto’s 155F (68C) thermostat keeps your engine running cooler for better power and more protection from detonation/pinging. This means you can run more timing, run leaner, and run more boost without risking dangerous detonation. If your cooling system is marginal in racing conditions this thermostat will improve cooling especially in lower load conditions, lowering overall operating temperatures. This thermostat significantly lowers your engine’s operating temperature and may cause a higher than normal idle and richer fuel mixture. If you’re running a stock ECU then the TRD 170F thermostat is a much better choice; this thermostat may cause an OBD error for insufficient coolant temperature.

Gasket included.

Lotus Evora 3.5L all

2003-09 Matrix/Vibe 1.8L all

2008-14 Scion xD

2015+ Scion iM