what do you guys run on your 22Rs to make them sound good = deep and mellow, no pop pop poping, not loud. I just had a guy put exhaust on my truck today and he ran 13/4,no cat, 30" glass pack. it is loud and pops on decel. He said he would work on it more tomorrow and try to make it work like i want it to. But I dont know what to have him do. I was thinking i might have to put a cat on it to wellow it out. any ideas?