I dont have carbon signal front lip on mine,but i do have c.s. rear add on spoiler, installed with 3m tape and adhesion promotor, when the adhesion promoter is used along with the tape it is very secure. not sure about the front lip.It is probably taped and mechanicaly fastened. be sure to use the promoter with the tape.
Get er done,
T.

Hey,
Would like to know how your car is coming along?