Vented Dipstick - Black - Dyna Billet dipsticks ventbreathe excessive crank case pressure from the oil tank through a PCV style breather consisting of an oil separator system perforated disc replaceable filter element and umbrella flapper valve Includes two different venting style options for installing the dipstick option 1 - 18 NPT breather vent fitting with internal porous filter element option 2 - quick disconnect coupler fitting with rubber hose and filter element There are two ways to read the oil level with this dipstick with the bike on the jiffy stand FHS Full Hot Stand or the bike upright and level FHU Full Hot Upright The oil pick up port is on the right side of the engine Letting the bike idle or warm up on the kickstand will naturally fill the engine case and skew the oil level in the tank Fueling test results show a decrease in engine oil sump levels more freelysmoothe revving engine and increased MPG and decreased blowby