www.ls1sounds.com will give you an idea but I highly recommend you hear each exhaust system in person before you make your decision so that you won't be dissappointed. How loud do you want it inside/out?
If you're thinking about going with Magnaflow (as I did), you won't go wrong by calling "Performance Peddler" at 1-866-399-4215. I got my 3"in, dual 2.5" out mandrel bent S.S system for $395 delivered to my door. That's pretty good! Love the sound, too.
The Corsa exhausts are the most popular that we carry and pretty much the only brand that I use on my vehicles. They are like having two different systems on the truck. Quiet during normal driving and aggressive when you lay into the throttle! There also isn't any interior resonance so you won't have to listen to any exhaust drone while cruising down the highway.
We have a group purchase running that covers all of the exhausts that Corsa manufacturers. This will save you some money for this system (ends August 8th).
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