Well ill be in the market for a new catback. I have mac now it was on the car when i bought it. Im guessing there flowpaths, and they sound ok, but its a little worse for the ware. I have been looking at flows, american thunder, but i dont want the delta flows (too quiet) do they make a catback with the original 2 ch 40's, will the amer thunder be louder than mac. Ill be putting long tubes and an orx on as well. I loved how slp sounded on my bullitt. but the flows are alot cheaper, plus im not too crazy on how the tips look on a fox on the slp c/b i like the straight tails. Ive been leaning towards the flows for the price, i want the loudest possible, but i dont want to have anything custom made. Any ideas? also i dont wanna break the bank doing it. so will flows be louder than mac? can i get a c/b with original 40's?