Not only is the "T" rating good for 118 mph, it's good for CONTINUOUS use at 118 mph. The OP's Subaru would be lucky to make it to 118, much less maintain that speed for hours at a time.
A "T" rated tire is more than sufficient for almost any normal passenger car in the USA.
In the "old days" we got excited about tires with an "S" rating, which will withstand extended use up to 112 mph. Now everyone thinks they need tires rated to 140-150 mph to make it safely to the mall. How times have changed!