https://www.filtonfilter.com/oil-filter/bo1409.html Spin on Oil Filter for AUDIA6 (4A, C4)078 115 561J. FILTON oil filter has Strong R & D and test capabilities. Stable processing technology, strict quality control. High quality shell material and anti-corrosion treatment, pressure and corrosion resistance. High performance sealing material and reliable connection design ensure reliable product sealing. Large effective filtration area, high filtration precision and large dust capacity. Reliable by-pass valve and check valve components ensure normal oil supply under any working conditions, effectively extending the service life of the engine.