Hi, I have an offroad x pipe, that I finally got on there without header to x pipe leaks, but need to pass an emissions test. I know catalytic converters work best when hot, but just wondering if there is such thing as a catalytic style muffler that would work, so that I don't have to pull apart my exhaust system. I still need to replace my cat back as the system is definitely a large bottleneck for my system. Anyways, has anyone had any success, even temporarily installing some used catalytic converts that are lying around past the x pipe. Or is there a catalytic style muffler that would work. Thanks