can i fit an alfa 146 exhaust / catalyst other other than the original ones? is it worth?
Just a correction to this to avoid any confusion...in the UK, a car after a specific year (1993/94 I believe) has to pass a specifically set emmissions level test. If you can tune/map the engine well enough so that it passes that emmissions level test without a CAT then it's perfectly legal in the UK not to have a CAT fitted. Your car won't fail an MOT simply by the non-visibility / non-fitment of a CAT...it can only fail if it doesn't meet the required level of emmissions.The cats on their to reduce polution, in the UK cars built after a certain year have to have a cat fited to pass the MOT.