The splitter attaches to the factory locations, no drilling or modifications required. Here is what customers have said about this new part, "Hey Joe! Just wanted to say thank you again for the front splitter! This thing is awesome!" "Joe, thank you. My wife, Jane, ordered the spoiler for me last week. It arrived yesterday without a scratch. Installed it today. What a top notch product, what ... a top notch guy you are. With your permission, I would like to leave the sticker on the spoiler when I attend car meets, Cars and Coffees etc. Thanks a bunch." New review"The Cayman at COTA with Joe's spllitter and diffuser. Car was five seconds per lap faster with the new aero. Same car and tires otherwise.Car also felt more stable at high speed. Next up is to add and test dive planes. " CS-Iceman on Planet9 Look at my other parts on Facebook......Joe Toth Composites