The high-performance Fram HP-3 filter measures 3.5" long x 3.7" OD. Gasket is 2.8" OD. Threads are 3/4-16 to fit many engines and most common remote filter heads. Replaces Fram PH16 and PH43. This is also a great replacement for the old Lucas spin-on filter (Part No. 1205) which is no longer available.