GP Slip On Exhaust - Street Twin/Cup


GP Slip On Exhaust for Triumph Street Cup by British Customs

The GP Exhaust is a truly handcrafted muffler. Step by step, each muffler is slowly, meticulously rolled and TIG welded from 100% stainless steel to create a muffler that evokes the golden era of motorcycle racing. GP-style exhaust usually only comes as part of a full exhaust system, requiring you to completely remove your old exhaust pipes and redo your air intakes in order to get them working. For riders seeking to give their modern classic a vintage road race look and sound, the GP Exhaust is the highest quality performance solution available.


  • Handmade exhaust by master technicians
  • 100% stainless steel construction
  • 2.5lbs per exhaust
  • Repackable stainless steel mesh perf core baffle for optimal backpressure
  • Vintage road race looks and sound
  • Rubber mounted bracket for increased durability and easy installation
  • Proudly made in the USA

    To get the maximum Performance upgrade on your Triumph Street Twin and Street Cup, try our Competition Header "X-Pipe" alongside the GP Slip On Exhaust. This Competition Use Only header upgrade opens up the exhaust and lets your bike run and sound as it should. If you are not comfortable with this installation please see your local Triumph dealer or call our team of Product Specialists toll free at +1 (877) 999-BRIT.



    Part Number

    Model Fitment


    2016+ Triumph Street Twin

    2017+ Triumph Street Cup


    Included Components:

      • Left and right GP slip on exhaust
      • Stainless Band Clamps
      • Mounting components

      Q: Do you have installation instructions for this part?

      A: Yes, we have developed a step by step Install Guide to assist in the home installation of this part. You can download the guide here. The Install Guide will also be emailed to you when your order ships.  

      Q: Do I need to remap after I install these pipes?

      A: Due to Triumph "Self Learning ECU" a Re-Map is not required. However, for additional Mapping flexibility, we recommend that you purchase and install a DynoJet Power Commander V. With this unit installed you can upload a custom MAP developed by DynoJet for our Exhaust products. These MAPs are available here.