Ford Mustang Forum - View Single Post - 2011 GT longtube headers quieter than stock
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post #8 of (permalink) Old 02-26-2016
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Blackpenguin69's Avatar
Joined: Dec 2010
Location: west texas
Posts: 2,391
If you have to redline it to hear something then your considered legally deaf. I can here a completely stock gt while cruising, my borla touring mufflers made it noticeably louder. Then I didn't boss side pipes and it got louder.

2014 Black 5.0 Track Pack with to many mods.
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