Proflow Air Filter Assembly Round 9in. x 4in, Black 300 to 400 series 380" Shank Closed Chrome Wheel

380" Shank Closed Chrome Wheel Nuts - 1/2-20"

are designed to accept anything with a 1/8" NPT thread

so this polyurethane mount will be a great option

Part Number : PFS-6000BLU-DATED

Part Number : PFEWP-005

Proflow Air Filter Assembly Round 9in. x 4in, Black 300 to 400 series 380" Shank Closed Chrome WheelPart Number : Proflows standard top air filter assemblies do not provide as much performance increase as our flow top range of filters, but they are an economical way to get your car to breathe. They are also completely reusable and still provide an increase in performance with their larger filtration element in comparison to standard air cleaners. Features: Your Choice in 6'', 9'',14'' or Oval Standard Lid or Flow Top construction Fits 5 1 8"