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    Now available the high performance K&N air filter used on the British Customs Air Box Removal Kit. We at British Customs use nothing but the best of air filters directly from K&N, and now offer this filter individually. If you want to replace your old filter with a new one or simply replace a damaged filter, we recommend this product! This is for the left side intake.

    Note: This filter is only recommended for left carburetor on Triumph America & Speedmaster.


    • 100,000 mile air filter
    • Maximum intake
    • High performance
    • Washable
    • Sold individually



    • Triumph America (With air box removal kit)
    • Triumph Speedmaster (With air box removal kit)
    • Triumph Bonneville EFI
    • Triumph Thruxton EFI


    Disclaimer: For off-road use not legal for registration for California.

    If you are not satisfied with your purchase we offer a no-hassle 30 day return policy. Items in unused, unaltered, unridden condition are eligible to return for store credit or exchange for FREE or we can refund to the original payment method for the cost of a return label. You can initiate a return online or by calling +1 (877) 999-BRIT or by emailing You will need your order number and the email attached to the order.

    Start your return here: Returns

    We understand that when you make an order, you want your gear as quickly as possible and we will do our best to make that happen! Most of the items we sell will ship quickly and be at your door fast.  

    In Stock Items will ship same or next business day.  The earlier in the day the order is placed, the better the chance it will ship that day.  

    A shipping confirmation email including carrier specific tracking information will typically be sent within 24 hours of an item shipping.  For example, if you place an order Monday night and it ships out Tuesday morning, you will receive your tracking information either Tuesday evening or Wednesday morning.

    View full Shipping Policy