All WIX filters:
51335 2.483" by 3.660", 3/4-16 thread, by-pass valve 8-11 psi, drain-back valve, 280 psi burst pressure, 7-9 GPM Flow Rate, 21 micron
51085 3.836" by 3.660", 3/4-16 thread, by-pass valve 8-11 psi, drain-back valve, 340 psi burst pressure, 7-9 GPM Flow Rate, 21 micron
51085XP...