MANN · Aftermarket MANN CF 1240 Cross Reference MANN CF 1240 is a mann-filter secondary air filter element. Known cross-reference alternatives include BALDWIN RS5550, HIFI-FILTER (JURA FILTRATION) SA 17342, SCHUPP /SF FILTER SL 81609. 3 cross-references found. Cross-reference alternatives BrandPart numberTypeDescription BALDWIN RS5550 Aftermarket Secondary air filter element HIFI-FILTER (JURA FILTRATION) SA 17342 Aftermarket Secondary air filter element SCHUPP /SF FILTER SL 81609 Aftermarket Secondary air filter element