07 Silverado Nbs Muffler

zxcv · February 29, 2008

Hey guys,

I bought an '07 NBS Silverado Ext. Cab, 4X4 in the summer, and love every aspect of it.

I just recently got a Flowmaster Delta Flow 40 installed, just the muffler, and I love it.

I was just wondering, as the interior resonance is pretty loud, and annoying when in AFM mode - does anyone have the Super 44 or the Original 40 mufflers? And if you do, how do you put up with the interior noise? Is there a way not to have interior resonance?

Anyways, the mechanic who put the muffler on said that if I were to get duals, well true duals, then there would not be enough backpressure on the engine, and this would cause problems.

On a separate unrelated note - I want to take the stupid front fascia off the truck, just the cheap plastic removable thingy. I've heard that it barely affects fuel mileage, but does anyone have any "official" specs on the fascia's purpose?

Thanks a million guys!