Round Plastisol Air

K & N ENGINEERING INC HA-4250 Features:
K& N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K& N filter element. K& N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.

Increases Horse Power And Acceleration
Custom Designed To Fit Factory AirBox
No Cutting Or Fitting Required
Million Mile Limited Warranty
Reusable/Washable
Long Lasting Performance

Round Filter Elements
Round Air Filter Element 6-3/8" x 2-1/2"

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N’s 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N’s most popular product!
Designed to increase horsepower
Washable, reusable, and engineered to last for the life of your vehicle
Designed to provide high airflow and exceptional filtration
Designed to provide high airflow and exceptional filtration
Engineered to fit easily into your factory air box
10-Year/Million Mile Limited Warranty

Increases Horse Power And Acceleration
Custom Designed To Fit Factory AirBox
No Cutting Or Fitting Required
Million Mile Limited Warranty
Reusable/Washable
Long Lasting Performance

K&N XD air filters use a Deep Pile Design, Extra Fine Weave Grade Cotton and alternate geometries for added efficiency and capacity for off-road conditions. This extra thick filtering medium provides the increased protection demanded by high dust conditions while continuing to provide the performance necessary to stay in the front of the pack. The XD Cotton medium was developed for the extreme conditions encountered by race teams in the Baja 1000. This real world testing is combined with testing performed at K&N's own Dust Retention Laboratory in conformity with the ISO 5011 test protocol. XD Cotton Air filters can be cleaned in the same way as K&N's original cotton air filters.

Replacement Air Filter 2025-2017 BMW G310R 313cc 2025-2018 BMW G310GS 313cc 2021 BMW G310GS 40 Years GS Edition 313cc

2 in. (51 mm) Flange Diameter
Oval Tapered Air Filter Flange Dia - F: 12'', 51mm Length - L: 2.75'', 70mm Base Dim - MA: 4'', 102mm Base Dim - SA: 3'', 76mm Top Dim - MA: 3'', 76mm Top Dim - SA: 2'', 51mm Top Style: Metal Flange Length - FL: 0.625'', 16mm

Replacement Elements
Replacement Air Filter 8-1/2'' x 2-3/8''