DEI 50169 Gray Original Finish Headliner Only for JEEP Wrangler JL 4 Door ymm_64 Mandrel bends and CNC manufacturing ymm_21 Mandrel bends and CNC manufacturing for maximum flow and accurate fit The sound output is tuned like a graphic equalizer to shape and focus sound waves for optimum high volume output Boom Mat's new Jeep® Wrangler Sound Deadening HeadLiner provides a simple pre shaped peel and stick kit that dresses up the interior of Jeep hard tops while minimizing annoying outside noise and vibrations while insulating from exterior weather conditions This is a significant change in sound level that will improve overall interior acoustics so Jeep occupants can enjoy audio system and have conversations without excessive and irritating noise distractions