Mishimoto 155F Thermostat - 1ZZ 2ZZ

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.
2000-05 MR2 Spyder – all
2000-05 Toyota Celica GT and GTS – all
Lotus Elise/Exige/2-eleven – All Toyota powered 1.6L, 1.8L, 3.5L
Lotus Evora 3.5L all
1998-17 Toyota Corolla 1.8L all
2003-09 Matrix/Vibe 1.8L all
2008-14 Scion xD
2015+ Scion iM