REMARK Axleback Exhaust. Subaru Crosstrek 18+ (Muffler Version)Looking to uncork that signature Subaru engine sound from your Crosstrek or Impreza Wagon but not have it be overbearing. Our axleback with muffler adds just the right amount of rumble at low RPM and full throttle while being subtle at cruising. Our axleback simply takes the place of the OE exhaust. Bolts on without any modifications. Does not affect vehicle emissions or cause any engine check lights. Our design leaves ample space for adding a hitch.