Mazda MX-5, Miata, Eunos Mk4 ND (2015-) Door Stop Bush Kit - PFF36-607 Each kit consists of 2x Door Stops The commonly replaced standard rubber door stops soften with age leading to high-speed door rattling, speaker vibration, and a generally frustrating driving experience.Replacing the standard door stops with our Powerflex branded 95A durometer door stops, resolves these NVH-related issues and provides a long-term, fit-and-forget solution. The audio quality from the door-mounted speakers is also improved due to the reduction of vibration. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!