Harley Davidson1987-2017
Buell1987-2002
The Best Oil Filters
The 100% synthetic micro-glass media we use to make Extended Life filters provides superior particle removal with 99% filtration efficiency at as small as 25 microns. The difference between Royal Purple and conventional oil filters is staggering
Design and Construction Advantages
SHELL
Each Royal Purple oil filter features thicker shell material for extra strength and extra security against puncture from road debris.
METAL END CAPS
Provide each oil filter with a positive seal for filter element assembly.
CENTER TUBE
Designed to prevent filter element collapse.
FILTER ELEMENT
100% screen-backed synthetic media provides superior filtration while keeping flow restriction low.
BY-PASS VALVE
Engineered to ensure oil flow in situations of excessive filter element flow restriction.
STEEL BACKPLATE
Heavy-gauge steel backplate through each filter for higher burst strength.
GASKET
Premium nitrile rubber with special lubricity compound reduces torque during installation and removal.
SILICONE ANTI-DRAIN BACK VALVE
Prevents dry starts by eliminating oil drain-back during shutdown. The anti-drain back valve is made of silicone, which outperforms and outlasts standard nitrile rubber in both extreme cold and hot oil temperatures.
