I just replaced my cats last week $2,100 for them with new exhaust manifolds. I had to replaced the valves covers and seals after I bought mine cuz it started dumping white smoke for a minute after start up and was burning a lot of oil so I think those bad valve seals might have messed up the cats. What year is your Armada?Thanks, I realized the squat was really only in my driveway, otherwise looks pretty even when I'm out on the flats. Great deal on your rig? I bought this one about 5 years ago with 151k miles on it for $5500. Came with the 22's but had road tires on it. The paint is in bad shape and I think they must have had it parked in a field or something in a while. I had to immediately dump 2000 bucks in it, replacing all the brakes, brake booster, front wheel hubs(ABS sensors), put some different running boards on it, added a tow package, etc. It's been such a fun ride. I have about 178k on it now and it runs like a champ, doesn't leak anything . Also learned 2 years later that the motor mount bolts were missing! That was SCARY. I put some in right away, but part of me believes the reason they were out was to do the catalytic converters, I'm hopeful because I dont want to have to do them lol.