British Customs Thunderbird Air Box Removal Kit
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British Customs Thunderbird Air Box Removal Kit

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British Customs Thunderbird Air Box Removal Kit

Looking to boost the horsepower on your Triumph Thunderbird or Thunderbird Storm? British Customs has designed an Air Box Removal kit that helps add up to 12.7* additional horsepower and 13 lbs./ft.* more torque.

The Thunderbird’s stock induction system heavily restricts intake airflow because it breathes through a small passage located under the seat. British Customs Air Box Removal kit removes the bulky, inefficient, plastic unit for a high flow K&N filter and a lightweight, aluminum battery box. The box is designed to secure all the nearby electrical components and has a place to fasten a DynoJet Power Commander.

This kit is just one piece in the British Customs line of Thunderbird performance parts. The above power increases were generated using a complete engine package consisting of the British Customs Airbox Removal Kit, British Customs Thunderbird Predator Exhaust, and a DynoJet Power Commander.

Kit Includes:

  • British Customs Battery Box
  • K&N Air Filter
  • K&N Crankcase Filter
  • Air Filter Adapter
  • Stainless Steel Hardware


  • *Increased performance for the Thunderbird 1600 and Storm
  • British Customs Battery Box Machined from Aluminum
  • Durable Textured Black Powdercoat Finish
  • High Flow K&N Filters
  • Custom Power Commander Maps Available For Download

 Note: You must install a DynoJet Power Commander V with the British Customs Air Box Elimination Kit

*Results may vary


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