Hi people collecting some mods for my car and was planning to get them all fitted at one, but rather than waiting I was wanting to fit what I could, so I'm going to buy a decat up pipe and would like to know if I would need a remap after removing the cat, also I've heard stories about the forth cilander overheating to failure after removing the cats, at the moment I've got a sport cat downpipe on a 2003 wrx