93 Z28 single cat car,

I have a Loudmouth now, stock catalytic, and AS&M headers. It isn't loud enough for me anymore, so I was thinking of either going off road pipe, and replacing the SLP resonator with a 12" dynomax bullet

289-24222 3'' In/Out, 12'' Long $35.99


or, instead of chopping up my Loudmouth, could I just replace my catalytic with some sort of muffler? How long could it be? How wide?

If I use the stock flanges on the catalytic, and cut the converter out, what size in/out pipe would I need there?

 

I also found these:

http://www.jegs.com/cgi-bin/ncommerc...10&prmenbr=361

flowmaster delta force race mufflers