Every Lubricating Oil pump made by us is tested on a testing rig 100% for oil delivery and pressure. The testing rig generates the same working condition for the pump as in the engine. Only the pressure and RPM for testing the pumps is more then 4 times then the actual engine requirement. This makes sure the pumps go through the most extreme working conditions which probably the engine might never actually face in its life term. However once these work properly on those harsh standards then they 100% OK for going on the engines for installation.