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Hi i have a 172cup with a decat on the standard exhaust was just wondering if there is much point in getting a cat back or wether to just find a decent back box? is the stock centre pipe very restrictive? also can anyone reccomend a cat back or back box they have used. cheers
my clio 172 cup is misfiring when warm will be fine until the engine reaches optimum temp but then will start to cough and splutter ocasionally. would a faulty oxygen sensor cause this? also am i right in thinking this is connected to the manifold? anyone have any ideads how to check for a...