OK, so phoned VX and was quoted £650 + fitting for the original part with x2 cats so after picking myself up off the floor I returned to Budget and explained that the car wasn't right with the exhaust they fitted. They inspected it and explained although they couldn't see any problems with the fitting and they would, as a precaution, order another exhaust just in case. When I asked about the "other" exhaust at £500 they couldn't source it and the guy I had dealt with on Saturday wasn't in today. Whilst on the phone to their suppliers the guy asked about the x2 cats and apparently the supplier explained that the part supplied IS the correct 'alternative' to the original, it's simply that they don't need x2 cats and that it wouldn't make a difference to the lambda sensors whatsoever.
They have apparently been supplying these exhaust's without any problem for a while now although I'm obviously still highly doubtful as to the authenticity of their claims so I'm returning tomorrow to have the other new exhaust fitted and failing that I'll see the guy I dealt with on Saturday and if he is able to source and fit the other exhaust with the x2 cats on it for another £100 then I'm going to have to bite the bullet and get them to do it. It's either that, or pay £650 + fitting to VX (best guess is that it would probably work out at around £800!).
Obivously, at the end of the day it's up to Budget to sort the problem now and until they do I'll be the their worst nightmare, day in day out.
Will keep you informed of the progress guys, thanks.
Marko
Right, heres the technical bit.
The 2.2 has 2 cats and two O2 sensors.
The first sensor appear in the main down pipe and used to control the engine mixture by going, rich/weak etc as per the info elsewhere on this site (think its in FAQ).
Next, you have the pre-cat following which you have another sensor which monitors the cat efficiency, next you have the main cat.
I am interested to know ehere these poor quality apttern items have these two O2 sensors fitted.
I also strongly suspect the statement
We have been supplying these exhaust's without any problem for a while now although
might be the case, I supect they ahev never done one on a 2.2 Omega with twin cat setup.
I would ask for your old front pipe setup back and take it away, get it repaired, insist on a refund and get somebody else to fit the repaired item back on..........if they no longer have what is effectively your property, then they would need to replace like for like.....i.e. Genuine!