I found this post by someone else. I thought it was interesting because it suggests the exhaust from both engine heads, have to be combined into one pipe, even if you see two pipes at the muffler.
It also suggests (to me) there won't be active fuel management.
Here is his post (from
http://www.worldcarfans.com/2051207.001/1.html)
I have a 2007 Silverado 5.3 active fuel management. I had dual uxhaust installed with a V Force muffler 3" in 2.5" dual out it sounds good as long as all eight cylenders are hitting when it shuts down to four cylenders it sounds like it is missing! Can anyone recomend a muffler that will not sound like that and still give me the benefits of dual exhaust?
Posted by LonnieSmith on Jul 24, 2007 at 3:04:12 AM