Polaris Xpedition X-Plorer Top Basket (Add on) Polaris Xpedition X-Plorer Top Basket (Add on to bed rack base system) Need some extra storage options? The SDR X-Plorer Top Basket adds a 1/8" aluminum floor with a 3 piece railing kit. 1/8” 5052 Aircraft Grade Aluminum rails... MSRP: Was: Now: $438.99 Add to Cart