I want to change my current rear spoiler on my 04 TL to the Deck Lid Spoiler. Can I install this without having to patch any holes from my existing spoiler? Pls advise...

 

What kind of spoiler do you have now? If you have the OEM lip spoiler, which is smaller than the deck lid spoiler and only uses two studs, and want to put the larger deck lid spoiler on, then it should cover the existing holes, which you can fill in with some kind of sealant.