Triumph Gearbox Cover Heat Shield Kit

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The Triumph Gearbox Cover Heat Shield Kit solves the problem of hot interiors in TR6 and TR250 model Triumphs.

Most owners of a Triumph TR6 or TR250 will tell you how toasty the interior can get on a hot day. With your feet up against the firewall, the gearbox next to you and hot exhaust running underneath the floor, well, it can become intensively hot, with or without the top down. And if the firewall and floor grommets are missing or worn out, or the gearbox cover seal is missing or damaged, you will get more hot air than normal through the footwells and transmission cover.

Design Engineering, has introduced a gearbox cover Heat Shield Kit for Triumph TR6 and TR250 models. The kit consists of a high-heat resistant material only 3/16” thick for minimal clearance and rated to handle 1750°F of direct heat. The material is die-cut into seven individual pieces that are applied to and fit together inside of the gearbox cover to reflect heat from entering through the gear box cover. Each piece is backed with a super aggressive adhesive for a simple peel, position and stick application. Also included are two packets of adhesion promoter, one roll of 1-1/2” w x 15ft heat reflective sealing tape to cover seams, a pair of protective gloves and detailed installation instructions.

  • Reduce interior heat for an improved & cooler driving experience
  • Light weight precision die cut pieces for a perfect fit
  • Withstands direct heat up to 1750°F (954°C)
  • Super strong, self-adhesive backing
  • Peel, position & apply for an easy and simply installation


  • 7 Custom cut pieces
  • 1 Roll heat reflective tape
  • 2 Adhesion promoter packets
  • Protective rubber gloves
  • Instructions

Triumph Gearbox Cover Heat Shield Kit

Installation Instructions:


  • 5
    Triumph Tunnel Heat Shield

    Posted by Shawn Frank on Sep 20th 2020

    Why didn't I get this product years ago? What a quality kit that has everything you need. The shield is great quality and looks as good as it performs. The adhesive is extra strong and will never come loose. The shield is thin and doesn't take up near as much room as the old factory "bag" and is easily trimmed and sculpted to fit to any Triumph. I modified my kit a little to fit the smaller Spitfire tunnel and I love it. Thank you DEI for such a quality kit!