probably stainless steel, unless you really need to get rid of a titanium one (good price). used, but not destroyed, is fine. 60/63 mm; don't want something too loud. stressing catback, since i want to keep my stock cat for now. no duals, please. thanks a lot.

 

i got a greddy tic single side exhaust cat back for sale!
wasnt that loud at all, i could still hear my radio.