Anyone use one and have any horror stories with fitting? 

 

https://www.amazon.co.uk/gp/aw/d/B00TPZWCJI/ref=mp_s_a_1_2?ie=UTF8&qid=1514359470&sr=8-2&pi=AC_SX236_SY340_QL65&keywords=auq+exhaust&dpPl=1&dpID=519FI7CZXJL&ref=plSrch

I will be doing the same in the next month or so as my cat has a rattle.  From what I understand they fit OK, you're advised to get some gaskets from TPS (or equivilent) as they don't seal very well and you may get an engine light from the second Lambda sensor which you can either space or have it mapped out. 

 

Only going by previous thread I have read on here.

I bit the bullet and ordered one.  Tried a cheeky offer and got it for £70 delivered.

 

Will see how we get on.