K&N 2-7/16in flg 4-1/2in b 6in t 6-1/8in h Extreme Duty

K&N XD air filters feature a Deep Pile Design and Extra Fine Weave Grade Cotton for enhanced efficiency and capacity in off-road conditions.

• The description claims that the XD Cotton medium was developed for extreme conditions encountered by race teams.
• The description claims that the filters undergo testing at K&N's Dust Retention Laboratory following ISO 5011 test protocol.