if you dont want that annoying high pitch than don't buy an exhaust from ebay EVER unless it's a well known name (greddy, apexi, etc etc). if you are JUST looking for sound than yes just got w/ a muffler (but be prepared to get bashed from other people) if you want an actual exhaust (cat-back) i'd recomend Greddy EVO2, Apexi N1, or Magnaflow. because these car's motors SUCK you will see little to no gain whether you go with just a muffler or a full catback.

 

Also, keeping in mind sometimes they try and trick you by saying "Apexi Style" that doesnt man ****