I used this with an exhaust pipe extension for my 2014 Jeep Wrangler JKU Rubicon and it sounds fantastic. I placed this muffler where the old factory resonator was and removed the factory muffler by adding a Dynomax exhaust pipe extension. The muffler perfectly matches the inner diameter of the factory exhaust, and the length of the muffler perfectly matches the factory resonator if you cut out the old one.