Apollo 2.0: With clean lines, smooth contours, and a design that works really well with our amazingly bright 110mm LED halos. Bring the exotic design from modern Porsche headlights home with these fresh shrouds. The Apollo 2.0's have a beautiful piano black finish that is accented by textured face for a unique and attractive look. Mounting: Centric Rings are not included by default, but are highly recommended to improve ease of installation on many projectors. The Centric Rings are simple reducers that clip into the shroud to reduce the inside diameter, making them more of a "press fit" onto the lens holder of the projector. JB Weld is also recommended in order to prevent the shrouds from vibrating loose over time. LED Halos: Are a unique and effective way to further customize the look of your projector retrofit. The all new Profile Pivot (switchback) and Profile Pixel (RGB) systems are easy to mount on the front of your shrouds, are reliable, and of course awesome looking. To determine which size is best for you - check out the size-guide in the images above. These shrouds feature DRL-Vents that will glow with light if you wanted to do something a bit different and mount the halos inside. Trimming: Please note that trimming shrouds is a common task when retrofitting. Whether required to clear part of the projector, or fit within the geometry of your headlight housing; it's normal. Luckily, they're made of plastic - making that easily possible. We recommend a Dremel hand tool with Ez Lock cutting wheels to make the job easy.