I have the Corsa sport side exit catback for my Silverado. Easy installation and I'm very satisfied with it. No drone at all on the freeways and very quiet at idle and partial throttle. At WOT however, my truck sounds wicked and I get compliments on the sound alot. Very similar to a LS1 Camaro. I don't know how anybody could say the Corsa sport is quiet. Performance wise I lost a little low end power but it really pulls harder up top. Also, Corsa is the only catback exhaust officially licensed by GM.

 

My Corsa Touring is not quiet when romped on. When fired up cold the higher idle shows there is something going on but when it idles down to the norm you can hardly tell it is not stock. Anytime I accelerate it lets one know it is not a stock system. It sounds hyper compared to the local red neck true duals of who knows who's mufflers they are.
he touring has the same internal packing added Cadillac puts in their STS mufflers that will not show signs of burning out for 300,000 miles. It is just a bit tamer than the Sport.
From listening to and riding in both the Sport dual rear exit and mine, I believe the dual rear exit is a different sound than the single side.

 

I can definately say that I totally agree. I've heard the sport and touring edition. The dual rear exit sounds extremely quiet even in the sport edition. My vote goes for the side exit with the dual tips, cause it definately sounds really wicked and nasty at WOT.

 

i have the corsa sport side exit. it is NOT quiet at WOT. at idle however, it sounds stock. i had the 18" single magnaflow, and the 12" dynomax before the corsa sport. the corsa sport i have is much louder than the magnaflow and even a little louder than the dynomax at WOT. the corsa does have the ls1 LM sound to it. its not as deep of a tone as other mufflers.