I cant find 3 inch flow tubes any where. I am putting together kind of a custom exhaust with MAC 1 3/4 long tubes with 3 inch collector and 3 inch VRS x-pipe and i want to go with 3 or 4 inch dynomax race bullets with dumps but i cant find any one that i can get just 3 inch flow tubes from. And if any of you know how a 4 inch dumped race bullet will sound let me know i dont want to do it if the car is going to sound bad i just really want it to be loud.