Bruline filters I believe have been gone for many years now and its understandable, there was just no market. I have not seen anyone using anykind of air cleaner now for perhaps eighteen years or so. There of course was the old trick of cutting a disc of your wifes silk
stockings and rubber banding it over the venture I suppose, heck do they still make silk stockings?

One trouble with the Brulines is when the fellows had a crash and the subsequent engine dirt bath the filters where the first thing to peel off doing no good at all.

Don.t know, for me any of that was just never worth the effort one way or the other. Perhaps another issue is many I believe simply move on so fast to bigger or so called better engines that most engines seldom see enough use for any kind of micron protection to make any kind of difference.

John