Thread: lowered my nismo now there is a thumping at 70 mph
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Old 02-27-2014, 11:20 AM   #7 (permalink)
fuct
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Originally Posted by Hotrodz View Post
It maybe the undertray...check and see if all the clips are still buttoned up. They will pop loose at high speeds and the undertray will flap when there is enough turbulence.
this!!!!

when mine came loose at 80mph it would sound like a horrible thumping. but it only got worse the faster i went.
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