Not much airflow through them (Only one side that can lead the air better). Take a look at my thread, I made som comparissions at the bottom of the page.Would this be any helpful, for temperatue in engine bay? Or is it just for mugen/tegiwa airboxes?
I like the looks and if i would benefit something im getting this
+1A little of topic but I got mine from Aerokit. You had to drill the fitting hole out yourself (better IMO since I can fit them perfect to the front) and also fit your own mesh. They sit perfect and I'm very pleased!