11 Inch Vortox And Donaldson Air Cleaner Pre-Filters

These 11 Inch Vortox and Donaldson Air Cleaner Pre-Filters are a practical and efficient solution for extending air filter service intervals. Sold as a pair, they repel moisture and filter debris down to 0.005 inches, improving fuel economy. With no measurable air flow restriction, they fit most 11 Inch Vortox and Donaldson Air Cleaners and are UV resistant, shatter-proof in freezing temperatures, and can resist heat up to 450 degrees Fahrenheit. The manufacturer recommends pulling them down or removing them during very heavy rain.