Hi, I purchased the tcr side skirts direct from vw, you need both the side skirts and also the mounting strip located behind them. To fit you need to remove the existing skirts and mounting stip ( assuming you have a gti) you also need to re drill the new mounting strips on as the fixing points don’t line up with the existing. The installation is reasonably straight forward though as once the mounting strips are fitted the bottom part of the skirt clips into the sill underneath and the top edge is stuck to the body with the pre fitted 3M tape. Tha bad news is the price though, mounting strips and skirts work out at £1054
Cheers Jason