2006 Silverado 2500HD 6.0L Flowmaster 40 Original 40 series

[@EJtcbGRAY]

Man, the 6.0 definitely gives these more of a bark!

[@AlaskanCharlie]

EJtcbGRAY Yeah, it’s the same muffler as my old 92 305 1500 had and it sounds a lot more aggressive with the 6.0L than it did with the 305!

[@lordserpentine8246]

Getting duals and glasspacks installed on mine this Friday but I wish I chose the flow master now

[@KsKaylor]

Damn that sounds mean, the Original 40 sounds a lot better than the Super 40 muffler that most of these trucks run.

[@AlaskanCharlie]

So far the only muffler Flowmaster has made that I would consider other than the Original 40 series might be the 10 series. How ever I just love the tone the Original 40 makes. I have used Delta Flow 40s in the past on other trucks and they were always way to quiet for me. I am glad I went with an Original 40 on this truck.

[@KsKaylor]

AllAlaskan907 The Original 40 is definitely their best product. I like the Super 10 as well but it sacrifices that sweet hollow sound a little more for the extra volume. I had Super 44s on a Mustang GT and they were really hollow but not as toned and refined as the Original 40. I have a 40 series without cats on my dad’s 04 Silverado, got a couple videos too, check em out and see what you think.

[@the101dad]

Super 40 just cuts the resonance out of the cab when at constant rpm.