These are Underground Auto's custom hand laid fiberglass speaker pods for the front fenders of the Polaris Slingshot. These pods come standard with two mounting holes for 6.5" speakers in each pod. The UnderGround speaker pods feature a textured black finish to match your OE Slingshot Fenders. Please note that depending on the brand of speaker you use for these pods that some trimming may be required.
More info about this product can be found here: UnderGround Auto Styling Front Fender Speaker Pods for the Polaris Slingshot