Get some PB Blaster and pre-soak all the exhaust bolts first thing on the day of the install. Have a sawz-all or other cutting tool handy just in case. I gave up and just cut through one of my stock exhaust bolts. Some of the bolts holding the exhaust to the engine head are a pain to get to. Hope you have small hands and patience Then getting the stock catalytic converters out is like a brain teaser puzzle. Maybe it's easier if you can have the Jeep up on a lift, but I did it all laying on my back under the jeep with the front end on jackstands giving me just a bit of extra room to work.