This is the ultimate oil pump for Twin Cam models and is highly recommended for stock bikes and an absolute must for modified bikes Eliminates wet sumping, blow-by and oily air filters through aerospace design and tolerances Aside from running cooler you will also gain 2hp and 4ft. lbs. of torque High flow 2" gerotor gears provide 40% more pressure volume and 60% more scavenge volume Directly bolts to stock location Fits all Twin Cam models