K & N Air Filter - CRF250/450R XD HA-4503XD Complete Clutch Kit 4 lbs pounds over the

4 lbs pounds over the stock can alone

This compared to 6061 costs 3x more if you use a Chinese grade 7075 and 4x more if you use a USA made 7075 (which is way better and we do use)

and springs

durability and weight reduction

Includes left and right shroud and trim decals

K & N Air Filter - CRF250/450R XD HA-4503XD Complete Clutch Kit 4 lbs pounds over theProvide high capacity, with low restriction, resulting in increased horsepower and torque Deep pleats provide high airflow and long service intervals Designed to increase horsepower and throttle response Pre oiled and ready to race! No fuel management modifications necessary Strong, pliable molded flange and seals Made in the U. S. A.