I used this muffler (12226) on an '06 Jeep Liberty. I added an 18" exhaust pipe section from my local auto parts store and it replaced the huge (and restrictive) factory muffler perfectly with no trimming. 5 minutes later with a MIG welder (you can use exhaust clamps if you want but I have a welder so why not?) the job was done. Total time for the project was about 20 minutes and now my little truck is about 1mpg better Sound wise it looks the same as the original in terms of noise and noise reduction but I have the Liberty Turbo Diesel version, that could be a factor (exhaust is identical for gas and CRD applications). Overall I'm very happy with the purchase, it works well, fits perfectly and is nice and quiet.