The OEM lip that comes with the car is usually held on by 3M tape. Mine was, and I think most people's were.
If you want to get betalink for the new spoiler, it comes with a solution I think to get rid of any extra you have.
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'11 BMW E92 ///M3 - ZCP and DCT
'15 Ford F-250 - Lariat, 6.7 Powerstroke Turbo-diesel
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