K&N Extreme Duty Air Filters Provide Protection and Performance in High Dust Areas

 
 
K&N XD (Extreme Duty) air filters are built to handle the most grueling off road environments. K&N’s E-3976XD, E-3977XD, E-3979XD and E-3978XD deliver superior performance in extreme conditions such as miles of whoops, silt, sand and rocks.

K&N E-3976XD Extreme Duty air filter has outside diameter and height of 16 inches by 5 inches
K&N E-3976XD Extreme Duty air filter has outside diameter and height of 16 inches by 5 inches

K&N E-3979XD Extreme Duty air filter has an outside outside diameter of 14 inches and a height of 4 inches
K&N E-3979XD Extreme Duty air filter has an outside outside diameter of 14 inches and a height of 4 inches
The XD cotton medium was developed to provide performance and protection for race engines that endure the rigorous demands of the Baja 1000 race or races such as the Las Vegas to Reno Best in the Desert Off-Road Race.
K&N E-3977XD Extreme Duty air filter has outside diameter and height of 16 inches by 4 inches
K&N E-3977XD Extreme Duty air filter has outside diameter and height of 16 inches by 4 inches

K&N E-3978XD Extreme Duty air filter has an outside diameter of 14 inches and a height of 5 inches
K&N E-3978XD Extreme Duty air filter has an outside diameter of 14 inches and a height of 5 inches

The E-3976XD, E-3977XD, E-3979XD and E-3978XD air filters use a deep pile design, extra fine weave grade cotton and alternate geometries for added efficiency and capacity for off-road conditions.

Various K&N supported Trophy Truck teams rely on K&N XD filters to help them compete in some of the world’s most demanding proving grounds.

Macrae Glass and The Glass Chiropractic Racing Team finished first in their class in the Las Vegas to Reno Best in the Desert Off-Road Race. Glass used K&N XD air filter, part number E-3978XD, in his full sized unlimited Ford pickup truck. “I used the same K&N XD air filter in the Las Vegas to Reno BITD Race that I used to win in the Terrible’s 250 BITD Race in Primm, Nevada,” said Glass. “I didn’t clean it before the Vegas to Reno run and it still made a difference and helped me get to the Winner’s Circle again.”

The outside diameter and height of the E-3976XD is 16 inches by 5 inches. The outside diameter and height of the E-3977XD is 16 inches by 4 inches. The E-3979XD has an outside diameter of 14 inches and a height of 4 inches and the E-3978XD has an outside diameter of 14 inches and a height of 5 inches.

K&N XD air filters are cleaned the same way as K&N’s original cotton air filters. They are also warranted against defective materials or workmanship for one year from the date of purchase with no mileage limitation.

Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.



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K&N Engineering, Inc., with headquarters in Riverside, California, has been the world's leader in performance filter technology since 1969, serving the needs of the automotive, motorcycle, marine, industrial and military markets. K&N is heavily involved in nearly every form of motorsports from off-road and powersports to drag racing, stock cars and road racing. For more information about K&N Filters, please contact K&N Engineering, Inc., P.O. Box 1329, Riverside, CA 92502-1329, (800) 213-4182 for a dealer near you, (800) 858-3333 for technical service/questions, (951) 826-4001 Fax, e-mail tech@knfilters.com, or visit www.knfilters.com.

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