V-Twin Mfg. Sifton Oil Pre Filter Features: Constructed of machined alloy with a 40 mesh screen installed to trap large debris and a circular magnetic collar to collect the ultra fine particles Easily disassembled for cleaning of the magnet and filter, simply screws apart Features barbed fittings for use on all 3/8 oil lines Installs on the following models in the following locations Early FLH and FX primary scavenger Sportster, FL, EL, UL and models without factory oil filter mount return line to oil tank Most other models mounts in 3/8 oil supply line before the engine