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These K&N air cleaners are a direct replacement into the stock 'Vokes' air cleaners found on Triumph and BSA twin 500 c.c. and 650 c.c. motorcycles. The best ever for your vintage motorcycle.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most motorcycles you simply remove the disposable air filter and replace it with a K&N. This will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.