de-catting
i was onto my mechanic looking to get the cat taken out of the celica. literally cut it out, weld a pipe in its place. he's saying that if I do that it will bring on the engine management light as the car will know its missing. then that will reduce power as with the light on the car wont give me full power, defeating the purpose of removing it. what he reckons is i would need to remove the cat and then get the car mapped..... i dont even mind buying a decatted exhaust if needs be but i never knew it would have to be mapped if i did that. so, anyone have an views or experience of similar. basically i want the cat gone for more power.... but dont want any lights on in the dash etc....