Frams spin-on filters can trap very small micron-sized particles that cause most engine wear
All filters have an anti-drainback valve with a maximum flow rate

HP4 – 13/16″-16 Thread
– 18 Micron
– 5.75″ Height
– 3.75″ OD

HP6 – 1 1/2″-12 UNF-2B Thread
– 12 Micron
– 5.688″ Height
– 4.625″ OD