there is no factory Toyota or Lexus interchange number for this. the automotive division only use 180 degree thermostats. TRD discontinued their 160's. The original part is made by "KUZEH" and is the factory supplier for Toyota oem thermostats. You may have luck checking on-line. I may have a supplier who can get kuzeh for this but i will need to know the Flange diameter, depth from flange to top, depth from flange to bottom. if you can supply me those dimensions ill see what i can find.
Aftermarket may be our only option.
