The original muffler was running out, I took the jeep and replaced the muffler, they put a cheap little muffler on it and it's still noisier than the original muffler! I ordered a Walker muffler and it turned out we needed an intermediate pipe and an exhaust pipe because the first guy ruined everything! We installed the Walker materials and it only took about an hour as it worked very well. Jeep now has great performance again as well as improved fuel economy. I didn't realize the importance of