Recently purchased a 2001 Tiburon. Worked my way through doing basic maintenance and audio upgrades as well as Big 3 upgrades. My exhaust is done af. I wanna redo everything from the header down. Looking online, the header with a cat runs from 250 up, but 4-2-1 headers are around 100. I was also thinking about swapping from two cats to doing one 3 way cat. Is this doable? I mean I know it’ll work out but will it be spitting codes for the rest of its life?