Subaru Thermostat - STI 04+ Gates the KW Variant 3 coilovers

the KW Variant 3 coilovers utilize TVC-A (Twin Valve Compression - Adjustable) technology and can increase or decrease the flow of valve to achieve either more or less low speed compression damping

and rapid heat dissipation

AEM Dryflow Air Filters are washable synthetic air filters designed for an optimum combination of air flow

RAYS logo and the 57 mark is embossed onto the spoke

Subaru Thermostat - STI 04+ Gates the KW Variant 3 coiloversCooling System Repair or ReplaceIf your thermostat has failed, it can stick open or stick closed. A thermostat that's stuck closed will result in an overheat that happens after the engine has been running for a few minutes. If it's stuck open, the engine will never reach proper operating temperature. Both can do long term damage to the engine in your 2018 Subaru STI, so contact a Subaru technician.