I like the looks of the Gibson system where the two tips exit in the stock location. I am considering this one, or the Magnaflow catback. I want the one that makes the least ammount of noise.
BTW: it will be on a rcsb 5.3

 

I have the gibson single and i like it well enough. It is really docile on the freeway and around town but still lets you know you have it on there when you get on it.

 

I've got a Magnaflow single exit and it is pretty nice. It has a slight rumble at idle but, is still quiet. When you get on it all hell breaks lose.

I've also got dynatech headers so with stock manifolds this exhaust is probably VERY quiet while just driving normal.

It's all stainless also which is nice. The 4" exhaust tip is kinda of ummmm....BIG. I let it get dirty and never cleaned it so it's not as noticable, might change the tip later for something less ricer like.

 

I love my Magnaflow

 

If you want something quaet, get the big 22" magnaflow. I have that one and it was a just a tab bit louder than stock. It's louder now with the cats taken off.