Fitment: Polaris RZR XP 1000, XP 4 1000. Not for use with 2016 Turbo models. SSV Works custom molded sub enclosure is designed for a 10" subwoofer and bolts into the open space behind the seat, clear of the cab. NO CUTTING REQUIRED, the box simply bolts in and provides the proper airspace required for a 10" woofer. They are 100% fiberglass for the best sound quality and bass response. They are finished in a black texture coat to match Polaris plastics and can be custom painted to match your color scheme. Includes grill, stainless mounting hardware and step-by-step installation instructions. NOTE: requires external amplifier. Not directly compatible with WP overhead systems.