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Yes, one of the criteria for my exhaust was no rasp and no drone on the highway while cruising. it's a header back fast intentions system. Resonated high flow cats, 18 inch resonators in the cat back and their largest quietest traditional oval mufflers. I love the sound. Around town it just purrs and it's silent while cruising.
If you decide to go with test pipes and you're goal is just decibels then I would go with the cheapest ones you can find. . .
No, but don't do it. If you want a loud car, get a V8 and delete the mufflers so you can be like every other GT/Coyote Mustang.
One of my neighbors has a mustang GT 4.6 with deleted mufflers that things sounds annoying and cheap! I couldn't see myself deleting the mufflers on my G I rather have a Axleback