Re: 4.7 with borla exhaust questions??
imho, the borlas do tend to drone a bit and resonate inside, more so at certain rpms. my friend has one on his 06, and a neighbor has one on his first gen and they both resonate quite a bit on the inside (extended cabs). on the outside, it's not much louder than stock, but for some reason, on the inside it's quite noticeable.
note - they do not have the full cat-back system, they have a universal borla in place of the stock muffler, and are running slightly larger tubing from the cat back, exiting at the stock location.
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