K&N Universal Fit PreCleaner Air Filter Foam Wrap

The K&Amp;N Airforce Pre-Cleaner Is A Specially Designed Foam Filter Wrap Made To Extend The Service Interval Of Your K&Amp;N Air Filter When Used In Very Dusty Conditions. The Airforce Pre-Cleaner Is Designed To Be Cleaned With K&Amp;N Cleaner Or Soap &Amp; Water. Red Colored Airforce Pre-Cleaners Air Oiled With K&Amp;N Air Filter Oil After They Are Cleaned. They Are Made From Large, Open Cell Foam. Gray Colored Airforce Pre-Cleaners Do Not Use Oil. They Have Smaller Foam Cells.