Vintage Styling. A great way to add the vintage styling of the muscle car era to your 2015-2022 Fastback Mustang is with a set of SpeedForm Vintage Quarter Window Louvers in matte black. With a five-slot open louver design, these SpeedForm Louvers will give your S550 Mustang bold, muscular styling while still allowing you to see clearly out of your c-pillar windows.Quality Construction and Materials. SpeedForms Vintage Quarter Window Louvers are manufactured from vacuum-formed acrylonitrile butadiene styrene (ABS) plastic for its light weight and long lasting durability. These Quarter Window Louvers are then completed in a smooth matte black finish for aggressive good looks.Peel and Stick Installation. No messy glue or drilling is required for installation. These SpeedForm Vintage Quarter Window Louvers are designed to attach to the factory C-Pillar glass with the supplied 3M doubled sided automotive bonding tape for a quick and easy installation. Just clean the surface, peel the backing and stick in place - its that easy.Recommended Styling Upgrade. When installing exterior quarter window louvers or scoops on your Mustang, it is recommended to add a set of quarter window blackout decals to hide the ugly back side that wasnt meant to be seen by human eyes. See part number 386505.Application. These matte black SpeedForm Vintage Quarter Window Louvers are designed to fit all 2015-2022 Fastback Mustangs, including the V6, EcoBoost, GT, GT350 and GT500 models. Sold as a set of two, one driver side and one passenger side.