Just had 3 cases (300 individual) of the vaunted 90915-2000 filters slow boated here from Japan dealer. To me the 20004 filters are the best toyota branded filters ever made. the 41010 is not a longer version of the 20004. it does not have the same plastic/synthetic fiber media. Here is a link which explains the difference.... the picture on the left is actually of the YYYZB5 filter which is basically the same resin/fiberglass synthetic media as the 20004 but with a different design on the by-pass and slightly shorter as a result.
http://mywebpages.comcast.net/jonmarkstewart/ofilter.htm
http://mywebpages.comcast.net/jonmarkstewart/ofilter.htm
