Hi my wife's picasso failed the MOT on a couple of things. One being the "rear exhaust is blowing". Quote for £80 from Kwikfit to replace, so i thought i'd have a look as you can get the part for £40 on ebay. Got car on ramps and the actual hole is on the pipe bit that the rear box connects to, so the middle section is the bit that would need to be replaced (no idea on price though). I spent £15 on a patch kit from halfords that contained some "metal putty" stuff and a roll of silver tin tape. Seems to have done the job. My question is that is a repair kit good enough (assuming it fixes the blow) to the car to pass then? or will they turn round and tell me the exuast needs changing?