Just bought a circuit sport diffuser and took it to a local body shop and he recommended that I used 3m double sided tape, that doesn't seem secure and there aren't any hole for screws. Any one have any Advice on just using the tape or any other ways to install it?

 

tape will be plenty secure enough, if your worry, just drill some holes yourself. personally, ive use the diffuser before and the tape alone held it just fine at speeds of about 120mph. (yes it was on a track)

 

Make sure to buy the one with red backing. 3m autobody tape