I'll be sure to mention this to my mechanic Charlie. Not on a Tipo, but the Uno back box took 2 hefty blokes, cutting equipment, blowtorches & a lot of swearing to remove. They actually said I'd have never removed it laying on the drive - so I'm glad I didn't try.
Good luck with the Tipo exhaust, there should still be plenty around on EBay.
Exactly my plans with the punto, make it mint.
If u need any part numbers etc give me a shout as I work for fiat.