I know it coverts harmful gases to less harmful ones but I need to know specifically which gases.
Does it effect CO levels
restricts gas flow mainly. But i believe it is a big heatsink that absorbs heat from the engine and exhaust system, then all the unburnt fuel goes through this and ignites cos of the heat and then burns up.
Crap on the carpet.....lol
Thanks for the replies looks as if I need a new cat. I hear there expensive
yes i think your right, they are around 250 i have heard. could get a performance replacement cat which will pass an mot for less!