I have looked around and searched but have not found any catback titanium exhuast anyone know where to find such a thing or where to buy 2.5" titanium piping?

 

go to the welding/fabrication section. click on the "where to buy" , right next to the FAQ, rules, etc. click on "burnsstainless". once you're at their site, look on the left for "aluminum tubing" and click. if you look at their "part number system for bends", you'll notice that the least section of their system is for the metal material you want to order. and one of the metals they offer is TITANIUM!