inputs.text: awesome subwoofer enclosure - installed sub box customers 14 silverado high country crew cab truck bought box amazon knew website comes everything seat spacers terminal cups optional gmc name plate screw top chevy bow tie really like fact sprayed truck bed liner looks really nice sitting seat bit larger seat okay installing seat spacers bit pain despite 6040 split rear seat one piece rehemove 8 nuts securing seat floor lift rehemove hooks hold seat back onto back wall actually helps install process bose amp back wall hook line output converter sub wires add sound deadening material plastic caps though case otherwise well built quality product