Napa oil filter

Here's the Wix numbers and their lengths:
7" tall - 51773 32 micron (1/2 qt. more capacity than the 51515 ) This is the truck filter.
5.1" - 51515 20 micron
4.3" - 51068 21 micron
3.8" - 51085 21 micron
3.4" - 51348 15 micron
Check out http://www.wixfilters.com/
Good site with an excellent interchange info.