Well it didnt then one did !!
I bought one from forum member daveyonthemove assuming it was complete with downpipe , it wasnt & was stainless so coudnt weld it to mine anyway.. (that'll teach me to ask more questions! ) ...
Ordered one from Awesome GTI, got 15% off & their man at Milltek said it would fit - tuned out the pipe exit was 63.5 mil & the standard is 57 ish so had a sleeve made up to mate it - theres an ebayer that charges 15 quid custom made , just send him the diameters - i didnt go that route in the end though as i found a local guy who made up one ..
Lovely bit of kit that Milltek stuff , i can see now why the arent cheap..