It started life as a MAC off road H. I welded in a pair of catalytic convertors that I had from another project though. I was careful to keep the pipes the same length and shape. The issue is that the mufflers I bought are MAC pro dumps. The hangers are welded to the exit of the mufflers. So Ive had to chop them off, grind the welds off, and reweld them back onto the mufflers themselves, just so the flowmaster pipe can fit over the exits of the mufflers. The flowtubes attached to the MACs are too long, and have the mufflers back too close to the axle. And honestly, the 3" flowmaster tubes are huge. Its a tight fit around the axle on the passenger side where you have fuel lines running. Couple it with each side coming in two pieces, and its a wobbly mess while youre trying to position i while laying under the car. I will make them work. I just know my exhaust shop would have done exactly what I wanted for a similar price, and I wouldnt have had to do all this chop cut rebuild. I honestly thought these would clamp on easy, which is why I bought them.