muffler upgrade

i have a 2002 grand cherokee 4wd larado, i want to get a performance muffler put on but im not sure what to get. im looking for something with a more agresive sound. if any one has any suggestions that would be cool

Is It a V8 or 6 cylinder? I like a turbo muffler myself. That is what I have on my 5.9 Limited. I'm not that big into brand name mufflers I just had whatever the muffler shop sold. I think you pay way too much buying major brands. I have a pair of Summit Turbos on my 86 F250 4x4 460. They were $14 ea 7 years ago & they are still just great.