SPLITFIRE High Performance Washable Air Filter Panel BMW 320i 323i 520i 528i M3 2 Year/50,000 km Replacement Warranty Splitfire are a major manufacturer of quality automotive parts including these free flowing high performance panel air filters. This filter replaces a standard panel filter in a BMW 320i 323i 520i 528i M3. 1994-95. The Splitfire panel filters can filter down to below 20 microns but the design of the filter material prevents dirt and dust blocking the filter allowing much better air flow. #SAF048. THE LAST FILTER YOU WILL EVER BUY 1 MILLION KILOMETER WARRANTY!! Long strand filtration cotton Unlimited kilometer warranty Higher airflow means more horsepower Dimensions 168mm x 280mm Suits BMW 320i, 323i, 520i, M3 3.0L, E36 5/95> on Suits BMW 325i 1991> on E39 Suits BMW 720i E38 1995> Suits BMW M3 12/1992> Equivalent to Ryco A1413 More air flow, more power. The one piece molded polyethylene seal or frame ensures an airtight seal in the airbox with no flow restrictions. Epoxy coated aluminium screen mesh protects the filter media and straightens air flow. For optimum performance, the filter should be cleaned and re-oiled every 6-12 months (or more if used in extremely dusty conditions). Air Filter oil can be purchased from most auto parts stores.