Use this K&N air filter when you're driving your Mazda MX - 5 Miata for daily commuting, long road trips, or even a bit of spirited driving. It's perfect for car enthusiasts who want to boost their vehicle's performance and save money in the long run. The filter is designed to fit easily into your factory air box, and while specific size and weight aren't detailed here, it's engineered to be a direct replacement for your existing filter, ensuring a seamless fit and great performance.