The DEI Boom Mat Sound Deadening Headliner is a nine-piece pre-cut kit that reduces interior noise by 3–4 decibels and lowers radiant heat from the roof. Finished in black with open-cell polyurethane foam, it offers a factory-like appearance while improving cabin acoustics and thermal comfort. Intended for 2018–2023 Jeep Wrangler JL four-door installations; peel-and-stick fitment.
DEI 18-23 Jeep Wrangler JL 4-Door Boom Mat Headliner - 9 Piece - Black