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I'm confused with this list. Everywhere I look it says to use a K&N 621 but this list says 138.
Since this thread is old as dirt, Banning never saw this question. The K&N 138 is the same size as the stock, AC filter, but the K&N 621 is a longer version. That's what I use, it filters a little more oil.
 
Since this thread is old as dirt, Banning never saw this question. The K&N 138 is the same size as the stock, AC filter, but the K&N 621 is a longer version. That's what I use, it filters a little more oil.
Even my question was 10 months old. LOL Thanks Hollywood. Have fun next week.
 
Are there cross reference filters good for the Trail models as well? I tried looking up the oil filter number on K&N's web site and it shows that they have no parts available for the Trail models. :confused:
 
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