/replacement muffler
 

Has anyone tried just replacing the muffler with an aftermarket one rather than doing the complete cat-back systems? I'm just looking for a little better flow without making it much louder. I have already removed the intake resonator and I am about ready to go to PCMforless for their tune but I would like to make any exhaust mods first. Any info would be appreciated. I did do a search but most topics deal with complete systems.
Thanks,
kk07h3