I'm looking at adding one of there 18" round mufflers to my stock exhaust and was wanting to know if any others had these types?

I believe the round mufflers are part of the race series. They are probably very aggressive ie... LOUD! Might sound really good if aggressive is what your shooting for. The smaller the casing on the muffler the louder it will be. If loud is what your shooting for might try a straight pipe first, save some money and give you a good base line for the noise level. Just a thought.

oh and

yeah there what I have on my mustang which there called magnapacks.

Here is a vid of the 14" version of the muffler..http://www.youtube.com/watch?v=6A8gKslCUm8

here is a vid of the 18" one...http://www.youtube.com/watch?v=pBa9UZSRApM

http://www.magnaflow.com/02product/02muffler.asp

this might help. They offer round mufflers in different applications.

You tube was down last night... that 18" sounds really good, but it doesn't say which 18" magnaflow muffler that is, or even if its round. The 14" has a little too much pop to suit me.

I have the standard oval case one, I love it, nice throaty sound, a very tuned sound for a single rear exit exhaust.

11249 is that the number you used buddy?