I put the the Dynomax muffler along the exhaust pipe where I wanted it and marked where it would go. I cut on those marks so the exhaust pipe would go inside the muffler ends about 1" to 2". about behind the driver side door I cut using my Milwaukee cut off wheel. I used the stainless steel lap joint muffler clamps to hold it all together. I have a welder but this was actually easier. When I took the OE muffler off I cut it open with my plasma cutter and that muffler is very restrictive and holds carbon build up. I also looked at other aftermarket catbacks and I was not feelin' the $300 price tag. Great sound and cheap. I will post pics and sounds once it quits rainin', I would melt in the rain. I still have to remove the heatsheild from where the old muffler was. With the new muffler, it is so free flowing there is really no heat build up as compared to the OE muffler, no heat sheild. It is not OE pretty but it looks ok and it is a Jeep not a Bently. This mod also added a little more pep, for $80 bones I couldn't beat it. The difference between no muffler and the muffler I installed was nominal, sounded almost identical. The dual catalytic converters do a good of already muffling the sound.