This is in the RX7 Club 3rd Generation Specific (1993-2002) forum. IMO, if you haven't seen this, you'll find it very interesting. This is the post it's in. Warning: the video is ~23 minutes long. The thread containing that post is also interesting.
https://www.rx7club.com/3rd-generati.../#post12583418
I know they work well (excellent filtering, low restriction for their size) because I have them on my F2000, my 342K mile 1974 Chevy G30 Van tow vehicle, and my '93 RX7.