As those of you with Weber sidedrafts know, air filter options are fairly limited even if you substitute a tii brake booster for the stock booster. The chrome oval and "ant eye" type filters look silly in our cars. Several members here are running air socks, canted at a 45 degree angle upward to clear the booster. I tried to source these, but these are not being manufactured anymore. I had been using very short wire mesh (stack) filters, but was concerned about how well they work. I ran across a guy making replica Alfa air horns that are canted at a 45 degree angle and topped off with a foam filter: https://www.corsavelocita.com/ I ordered a set hoping that they would clear the brake booster and luckily they do. I haven't had a chance to run with them yet, but thought I would pass this along as I spent months looking for something like this.