I would use more than just tape on a front splitter which will have additional pressure placed upon it when doing 100mph, probably in excess of 20lbs. I have a trunk lip mounted with tape only on a vinyl wrapped car, that said, I used screws and tape for the front splitter.

 

Unfortunately, if you drive your car even close to 100 mph with the splitters attached with tape, they will most likely get loose and fall off. Most people on here with a front lip/splitters used 3M double sided tape ALONG with some self-tapping screws/drilled regular screws.

 

As others have said, the tape alone will not hold the front lip.

I have fixed mine with some sort of bonding agent and screws. The downforce is so high that my bumper has started tearing apart from the front left.

 

Tape will not hold your front lip. You will end up loosing it (like many have mentioned) i would either make holes and put screws in or, I find these honda clips works great!

 

When using self-tapping screws alongside the bonding agent/tape is there an ideal length of screw? I am assuming that the screw is just self tapping through the splitter into the underside of the bumper and there are no structures/essential engine ancillaries in the way that could get punctured? Equally I do not want to be too short.....although I think I'll be ok, at least according to my wife, who has just informed me I shouldn't worry about length!!!! LOL. But they all say that don't they!

 

My original VRS broke into like 5 pieces. I bought one off eBay and mounted it with screws. Everything good so far!