I'm going to fab up my own 2.5" DP, from turbo to gutted cat. I got 1 180 degree U bend, and 3 90 degree bends all from JC whitney, for about 50 bucks. I got the turbo flange from HRC for 9 bucks, and i can get the o2 bung, and the other flanges and flex section, from a muffler shop accross the street from my shop, for pretty cheap. I will cut it up, and fit it, then tack weld it together, then have a welding shop do it up really nice. Total i estimate to spend is around 150 bucks. It wont be coated or anything, but who really cares how it looks. I just want it to work.