Just installed a flowmaster delta 40 series the other day and its got a great rumble to it. Not only that, I have noticed an increase in passing power and it sounds quite beefy... It was $98... at Autozone... you need the 2.5" inlet/outlet one... they may have to special order it

 

I ran a flowmaster delta 40 and it had a nice tone, but wasn't loud enough for my liking. I liked it though.... it rusted apart in a few months. Went MBRP and haven't looked back...

(well... maybe a original 40 in stainless would be nice)