Will the exhaust from my old manual n/a fit an auto tt?

i can not see why not .. the down pipe/headers flange bolting points are in the same place

 

but looking at that pic u sure the piping is 2.5" ?

Think it should fit, autoboxs can have clearance problems with front pipes hitting but i think this maybe just a japspeed de cat problem.Looks like that system is all one peiece or is there joins at the front ,dont snap the 3 studs at the front off there a pig to drill out .

mark.... I'm not sure if its 2.5", I'll have to measure it.

Does it need to be 2.5 minimum then?

Taff..... Yeah its 1 piece from front to back (rear boxes might come off but not 100% sure on that).

Was kind of tempted to replace my single exit system with this one as it had such a great sound and no one else is interested in buying it.

Its not a hard and fast rule it has to be 2.5" but turbo cars do like a bigger bore than a na looks plenty big enough bore to me in the pics .

I've just measured the exhaust and at the down pipe end And it measures 2" across.

Does this mean its not really suitable for a TT?