K&N parts matching Donaldson P550437 fuel filter

The Donaldson P550437 fuel filter cross references with the K&N fuel filter parts below. K&N offers compatible fuel filters for many Donaldson fuel filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Fuel Filter
  • Built for High Flow Rates
  • Outstanding Filtration
Todd Herbers, River Falls, Wisconsin
Super easy ordering and awesome filters. I've tried them all. This is the best by far. Prices are great also. Thanks. Todd
Sean, Red Rock, Arkansas
Part fits in perfectly for an easy and quick exchange. There was noticeable response in power over the old dirty filter. Wasn't until further research that I found out that the previous owner of my truck (00' 7.3 F250XLT Super) was using the same filters. Keep up the good work K&N.
Dennis Munn, Macon, Georgia
Very easy to change out. I'll be changing all my further filters from now on.
PF-4000 K&N PF-4000 Fuel Filter
List Price: $54.89
Your Price: $34.99