UNI Air Filter - NU-4131ST - Honda CRF/XR50 CRF/XR70

UNI foam air filter for the Honda CRF and XR off-road motorcycle models listed. UNI Air Filters are unsurpassed in airflow, dirt stopping and overall performance. They produce more horsepower and more torque than any other air filter. Replace the stock air filter with a serviceable air filter! The UNI foam filter needs to be oiled. We have the oil available here.

Features:

• Designed to fit the in the factory air box exactly like original filter.
• The best selling replacement air filter for competition motorcycles and ATVs.
• Unique two stage design allows for easy and complete cleaning.
• Dual layer of foam, can be serviced separately. 
• High flow UNI filter will improve performance and provide the best filtration and engine protection available
• Flow Matched filters need no rejetting.
• Thin ultra seal base is virtually impossible to tear and has a a built-in grease groove
• Made in the USA

UNI Part Number: NU-4131ST

Replacement for Honda Part Number: 17211-165-730

Fits Honda: