Kandamp;N is the leading manufacturer of air filters. This panel filter drops into your factory airbox and gives you a filter that lasts forever! You simply remove the disposable air filter and replace it with a K/N. Million-Mile Limited Warranty and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.
K/N Panel Replacement Air Filter Features:
-High Air Flow with Excellent Filtration
-Designed to Increase Horsepower and Acceleration
-Washable and Reusable
-Will NOT Void Vehicle Warranty
-Lasts up to 50,000 miles before cleaning is required depending on driving conditions
-K/N Million Mile Limited Warranty
-Emissions Legal in all 50 US States.
-Works with OEM Vehicle Electronics
-Easy High Performance Add-on
Brian's Application Notes: Our dyno work with and without any filter in the factory airbox found no gains on ND1 Generation Miata. And our dyno work with several brands of intakes on ND1 generation found zero power gains with any of the complete intake choices. ND2 generation Miata has quite a bit better breathing at the top end, so we cannot say at this time that there are no gains with ND2. Nonetheless, at this time our opinion is that these choices are likely giving you only a washable filter, not a performance gain. We will seek to repeat some of our tests on our 2019 as time permits.
All the old timer auto cross and track drivers I know brought this air filter to my attention. Performance enhancement opinions vary but all agree it's the best box air filter available and just about maintenance free. Never replace your air filter again is a feature I couldn't resist. Recommend.
This is the way to go, rather than wasting time and money on a cold-air-intake. Knowledgeable folks know that a drop-in filter like this is actually the best choice for a ND Miata, and extremely easy to do.
Cheapest 5-8hp you can get. You will be sacraficing your filtration for more air. I only have the drop-in for canyon run and track day. Installation is literally like it says, drop in.