Recommended installation of M&S Carart fender flares is to have them molded on by a professional bodyshop. However, these flares can also be installed with rivets, bolts, screws, silicone, or even industrial strength double-sided tape. The installation is relatively difficult, so please consider having a professional take care of the install.
Pricing is for a pair of flares. If you want to do all four wheel wells, then purchase a quantity of 2.