Adding rear seat speakers to your Polaris RZR 4-Seater kicks your entire Polaris RZR audio experience up to the next level. Just add the Polaris Off-Road Audio - Rear Door Speakers by MB Quart to your existing front door speaker/amp configuration and crank up the volume. This Polaris RZR sound system kit includes two door panels, two 6.5” marine grade coaxial speakers with .75” titanium dome tweeters, wiring harness and all mounting hardware. The MB Quart marine grade speakers incorporate a mica filled polypropylene cone to stand up to all weather extremes and provide longer life than traditional speakers. Plus, the IPX67 Waterproof and Dustproof Design* provides maximum protection against water and dust intrusion. Maximum sound and clarity with Polaris RZR audio MB Quart is a leading manufacturer of high quality mobile speakers. They’re known for their uncompromising sound quality and performance. That’s why Polaris collaborated with MB Quart audio engineers to develop the perfect speaker kit for your 4-passenger Polaris RZR. The mid-range speakers pump out clean bass and the integral tweeters provide crystal clear highs clear highs. So you can get a full audio experience that carries throughout the vehicle, without being drowned out by engine or road noise. Installation notes: This rear door speaker kit complements the 2881989 front door speaker kit and easily connects to either the 2881988 Polaris RZR dash stereo or the 2882122 Polaris RZR dash amplifier (recommended for best performance). MB Quart is a registered trademark of Maxxsonics USA Inc. This Accessory is Designed to Fit the Following: RZR , 2023 RZR XP 4 1000 Ultimate , 2022-2023 RZR XP 4 1000 Sport , 2022 INTL RZR XP 4 1000 EPS , 2021 RZR Turbo S 4 Velocity , 2021 RZR Turbo S 4 Lifted Lime LE , 2021 RZR Turbo S 4 , 2020-2023 RZR XP 4 1000 Premium , 2020-2022 RZR XP 4 1000 High Lifter , 2020-2021 RZR XP 4 Turbo , 2020-2021 RZR XP 4 1000 , 2020-2021 RZR S4 1000