53' 172 Cup
About 2 weeks after buying my motor 1 of the lambda sensors failed on the Cat so went and got a new one (£100) now there is a real annoyin rattle coming from the exhaust (sounds near the Cat) that is only heard round 900rpm or 2200rpm.... took it to garage an they reckon something fallen into the cat - could be mega bucks to sort!! it cant be rite that the cat is on its way out after only 25k miles on the clock surely????