Subaru is the manufacturer left that still produce flat-four, Boxer motors.. All the other manufacturers work with in-line cylinders or lay them out in a V arrangement. The Boxer motor does give off its own distinct drone, an abject wash that has made Subaru so unique over the years, especially in WRX STi subsidiary. Here in the WRX the gargle is mostly evident at idle and in our manual six-speed with an added exhaust upgrade it entices you to get in and give it a full hammering. As you wind up through the revs though, the sound seems to disappear and it’s relatively quiet in the cabin, the whine of the turbocharger is the most distinguishable sound from the driver’s seat. The [...]