Includes both sides

especially with the engine lock up tool

heat treated for strength and durability

Suitable for Petrol or Diesel

DNA Air Filters - Air Filter for BMW R 1200 GS 11-18 (Κ50) / R 1250 GS 19-23 Options:Air Filter Includes both sidesThis filter features DNA's advanced FCd (Full Contour design). Installation of the filter is very easy, simply follow the information that can be found in the BMW workshop manual. The filtering efficiency is extremely high at 98 99% filtering efficiency, with 4 layers of DNA Cotton. The flow of this DNA Fcd filter is high, 15. 3% higher than the stock BMW paper filter! DNA Fcd air filter flow: 151. 00 CFM (Cubic feet per minute) @1,5"H2O corrected @