This conversion kits fits all 1GR-FE 4.0L V6 engines including the 2010 and later FJ Cruiser and 4Runner. The kit ships with a 170 degree thermostat.
The URD performance thermostat conversion kit allows you to convert your stock thermostat housing to accept the new cooler thermostat.
Lowering the engine coolant temperature allows a more aggressive timing curve to be used and the incoming air is heated less by the engine so more power can be made.
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