Just signed up and was doing some searching but didn't seem to come up with an answer doing a threat title search. If I missed a discussion on this please except my apologies. Have had a 2005 Z71 Suburban since March and I drive about 1800-2400 miles/week in it for work. It has done a perfect job so far but I was getting itch to change some things so I started looking around and Corsa Exhaust really seemed like a nice system, but I know nothing about them (I'm a motorcycle guy). Along with the sound, even 1 MPG increase will be huge for me because of the way I'm reimbursed for my mileage though my company. So I wouldn't mind a system with a nice system that sounds great with the windows down through town (Or a tunnel? ), but when the windows are up and I'm driving from Philly to Pittsburgh, I don't want to be clinically insane because of any droning once I get out. The Corsa Touring systems seems nice but I don't know how much quieter it is than the Sport? Does anyone have any input that may have heard both from inside? Or... any other recommendations for systems that I may have overlooked? I'm looking for something that will last a long time and, again, not as noticeable when sitting inside the tank. Thanks!