Description
The Roger Clark Motorsport thermostat is designed not only to improve reliability (thanks to its superior construction and RCM's strict quality control inspection process) but also to provide an earlier start in your engine's cooling process.
With a low temp thermostat in place your engine coolant is allowed to circulate around the engine much earlier which allows overall engine temperatures to be reduced sooner than they would normally occur. Ultimately your coolants job is to carry heat out of the engine, take it through your radiator (where the actual temperature reduction will occur) and then flow back into the engine at a reduced temperature to when it left. This entire process is activated by a door opening and closing (your thermostat), so if this "door" is opened earlier than would normally be expected then the coolant can get a head start on taking heat out of the engine.
With coolant flowing through your engine at an earlier stage (thanks to a low temp thermostat) the next area to make significant temperature drops would be a performance radiator. A larger radiator not only increases how much coolant can be present within it at any one time, but with a larger surface area and an improved fin design this can allow a higher volume of air to pass through, this in turn lowers temperatures on your coolant fluid faster, more efficiently and in greater volume.
Low temperature thermostats are most suited for vehicles driven spirited on either road or track where engine temperatures are likely to raise at a much faster rate than if the engine was being driven under normal road use.
- Allows coolant to flow through your engine at a much earlier time than would usually be expected.
- Reduces coolant and engine temperatures earlier.
- Great addition to any performance radiator.
- Improved part reliability when compared to other manufacturers.
- RCM Thermostat opening starts at 70°C (158°F) and is fully open at 90°C.
- OEM Opening starts at 90°C (194°F) and is fully open at 95°C.
Fitment:
Forester
04-08 Subaru Forester XT 2.5 EJ255
09-13 Subaru Forester XT 2.5 EJ255
Impreza
1998 Subaru Impreza RS 2.5 EJ25D
1999 Subaru Impreza RS 2.5 EJ253
00-01 Subaru Impreza RS 2.5 EJ251
Legacy
05-09 Subaru Legacy GT 2.5 Turbo EJ255
10-12 Subaru Legacy GT 2.5 Turbo EJ255
STI
04-07 Subaru Impreza WRX STI 2.5 Turbo EJ257
08-14 Subaru Impreza WRX STI 2.5 Turbo EJ257
15-21 Subaru WRX STI 2.5 Turbo EJ257
WRX
02-05 Subaru Impreza WRX 2.0 Turbo EJ205
06-07 Subaru Impreza WRX 2.5 Turbo EJ255
08-14 Subaru Impreza WRX 2.5 Turbo EJ255
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