which cats for my headers install?

[snake_skinner00]

gonna be puttin my pacesetters on in a few days and my loudmouth II is already loud enough so i know my LTs will make this car sound like a dragster, so i am gonna try and tone it down slightly by adding 2 cats (1 on each section of the Y-Pipe. what i'd like to knwo is, which cats should i go with? are any brand just as good as the other? the Y-Pipe is 3 inches round, so should i get 3.5 inches to slide over the y-pipe or 2.5 inches to fit inside it? just dont wanna spend money when i'm not sure what i should get.

[snake_skinner00]

nevermind, just went with a Texas-Speed TSP Catted Y-Pipe ...better quality anyways