There are more ways than you think to reduce conducted EMI - Automotive - Technical articles - TI E2E support forums
Whatman 1001-055 Whatman 1001-055 Qualitative Filter Papers; 5.5 cm Diameter; Pore Size, 11µ (Pack of 100): Amazon.com: Industrial & Scientific
Quantitative Filter Paper Circular Filter Paper Use For Laboratory Precision Quantitative Analysis Diameter 12.5 Cm 100/pk - Beaker - AliExpress
Optimizing EMI Input Filters for Switched Mode Power Supplies - Technical Articles
Speed Up the Design of EMI Filters for Switch-Mode Power Supplies | Analog Devices
Elimination of Common-Mode Choke Saturation Caused by Self-Resonance of the EMI Filter in a Variable-Frequency Drive System | Semantic Scholar
Canton Racing Products 26-120 Oil Filter Element
Equivalent circuit of typical EMI filter: (a) schematic of Fig. 3; (b)... | Download Scientific Diagram
Proposed LCL filter with CM current trapping capability: (a) Filter... | Download Scientific Diagram
Components—Part 5: The Common Mode Filter's Acrobatic Ability to Separate Signals and Noise|Intro to EMC Topics|Learn about Technology with TDK
Over 25 Years Common Mode Filter (CM Series) Manufacturer - Viking
Using CM Y capacitors after CM chokes - Electrical Engineering Stack Exchange
EMI filter design for single‐phase grid‐connected inverter with noise source impedance consideration - Liu - 2020 - IET Power Electronics - Wiley Online Library
Filter Paper for Filtration, 11 cm | 10/pk | HST
Safety concerns for practical EMI line filters - EE Times