Sorry it was CarSound not Catco,
I ordered it from http://www.warpspeedperformance.com/jeep.htm
I talked with them on the phone and they sent me out the cat, muffler, clamps, and adaptors. Muffler is a louder than stock, but the combination keeps our jeep at 20-22 mpg with 50/50 city highway driving all the time.
we were referring to a straight pipe as just a foot and half length of 2 1/2" exhaust pipe. the pipe replacement will work and is very cheap intitially, but I don't know how the gas mileage will be.
If you have a sawzall, cut the thing out yourself and put it back together and same yourself a lot of money. I borrowed a sawzall from my neighbor and put it in.