Got mine from Spoiler Depot - came with 3M double sided tape. 2+ years and hasn't budged.

 

i have had mine on for 4 months and it has gone thru a MN winter and car washes and me washing it and pressure washing it with jsut the tape and it hasnt moved at all

 

the tape doesnt move trust me....

I crashed my first audi, pulled off the 3m lip spoiler from the trunk, and used the same tape and spoiler formy new audi, and this thing is not budging anywhere STILL after being pulled off another car.

THE TAPE WORKS PERFECTLY.

 

Have one also. Did not apply any extra adhesive and there have been no issues.

 

My car came with one (identical to the one in the ebay auction) and the previous owner put it on when the car was bought new in 2000. I guess that means that they stick. XD

 

yup, the tape is very good. if you wanna be extra safe, make sure to take off any wax in the area your gonna put it, by spraying a wax/adhesive remover in the area

 

yea, just follow the install instructions.. and that bitch isnt going anywhere