Free Shipping on US Orders $150+
0 Cart
Added to Cart
    You have items in your cart
    You have 1 item in your cart
    Check Out Continue Shopping

    The better your Triumph Modern Classic breathes, the better it performs. Its just that simple. With the British Customs Air Box Elimination Kit you can remove the restrictions inherent with the OEM air box and snorkel configuration and open up the fuel system with some free-breathing K&N cone filters. Dollar for dollar, this is the best performance upgrade you can get for your Triumph


    • Increased air flow means more horsepower
    • Improved throttle response
    • Two high flow washable K&N filters
    • All necessary hardware for stock reinstallation included

      What's in the box:

      • British Customs Battery Box
      • Stainless Steel hardware
      • K&N High Flow Filters
      • K&N Crankcase Breather Hose Filter
      • Carburetor Support Brace for carb models
      • Jetting Kit for carb models

       Common Q & A's:

      Q:  Do you recommend this upgrade with my stock exhausts?
      A: There would be almost no performance upgrade as the stock exhaust would make the flow "bottleneck" as the stock slip-ons are quite restrictive. For the best bolt-on performance upgrade, we recommend this with an exhaust upgrade

      Q: Can I still use my sidecovers or will this leave the sides of my bike exposed?
      A: Sidecovers can be used after installing the Air Box Removal Kit

      Q: Which jets in the carb kit do I use for my British Customs exhaust?
      A: We've included more than one size to ensure you get a ballpark range to start off with; Jetting will depend on the location/elevation/etc. If you are not familiar with jetting, we recommend getting your carbs tuned through a professional mechanic to ensure a proper install.

      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

      Hear from real customers