In 2015, I replaced my factory exhaust on my 2007 Chevy Silverado with a true dual exhaust set up using two Magnaflow stainless steel performance 4" diameter 'straight through' mufflers with 14" bodies, a 20" overall length, and 2.5" piping in and out (part number 14416). I have not replaced the headers or the cats yet.
In this video I test the sound level of the true dual MagnaFlow exhaust when in motion and go over some other mods/updates that have occurred since a year ago.
Also, check out my before and after comparison video of the exhaust.
• Chevy Silverado True Dual Magnaflow Exhaus...
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If you have any questions about what I have done or products that I have used, feel free to ask in the comments below.