carbon cabin air filter for audi a4 a6 rs4 rs6 s4 s6<br /><br />specification:<br />length: 298mm<br />width: 203mm<br />thickness: 29mm<br />color: grey<br />weight: 125g<br />quantity: 1<br />manufacturer part number: 4b0-819-439c<br />other part number: 4b0819439c， 8e0819439， 4b0 819 439c， 8e0 819 439<br /><br />feature:<br />100%  and high quality.<br />easy installation and simple design.<br />used to filter the suspended particles in air in order to reduce attrition during air cylinder and piston.<br />the air filter is an essential supply for the health of both you and your vehicle.<br />we recommend replacement of the air filter every 4 months .<br /><br />fitment: (just for reference. please make sure that the part number matches your existing one before purchasing！)<br />audi a4 a6 rs4 rs6 s4 s6<br /><br />package included:<br /> 1 x air filter<br /><br />note:<br />1.instruction is not included and professional installation is highly recommended.<br />2.we provide clear pictures， measurements where possible. please check as much as possible to make sure the item is the one that you need.<br />3. please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)