It droned a lot, but it's also a 6.0, I've read those have a tendency to drone more than the 4.8/5.3s. Like I said, a lot of people here love the 22" magnaflow, but it just wasn't good for me.

 

I just put my 22" Magnaflow Dual 3" IN, 4" OUT back on. It did drone a lot through the 4" tailpipe. It is noticeably better flowing out through the turbo than it was with the tailpipe alone. I just replaced the Flow Pro 14" I had on and I like it a lot better than the Flow Pro and I liked the Flow Pro better with the turbo than I did the magnaflow before the turbo. It is not perfect but the 6L seems to present a challenge in the exhaust department. I still have to put the 4" tailpipe back on. Not sure how that is going to affect the sound?