The First Offense™ air filter has a cool Buck Rogers feel, with its satin aluminum finish and bronze mesh back and teardrop shaped intake holes. It's small size 4" (H) x 10" (L) makes it also very attractive. Direct bolt-on for CV & S&S Super E and G carbs. For fitment to Mikuni HSR carbs, use Mikuni #HS42/001 air box adaptor in conjunction with either KHS-020 (Evolution engines) or KHS-030 (Twin Cam engines) crankcase breather kit.  It iss sold  with the stainless backing plate, bronze mesh and Uni-Filter foam element. Price is for satin finish. Polished & chrome on special request.