Sleeper Pro™ Slip On Exhaust for Bonneville T100/T120

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British Customs Sleeper Pro for Bonneville T120

The Sleeper Pro Exhaust pipes are fabricated using 100% 304 Stainless Steel and are styled after the classic Triumph Exhaust of the 1960's. The high-performance mufflers feature our maintenance free Louvered Baffle system and are mounted with rubber bushings to isolate engine vibration and significantly reduces bracket fatigue, extending the longevity of your investment. Each system is handcrafted and TIG welded for the specific application. Installation is quick and easy for a bolt-on factory fit and finish. To match the factory headers on the Bonneville T100 and T120, we offer the Sleeper Pro in Polished or Black (for T100/T120 Black Models). Each Exhaust is individually inspected prior to packaging.


  • Free Flowing Exhaust to Increased horsepower
  • Over 2 pounds lighter than stock mufflers
  • Classic Triumph exhaust tone
  • 304 Stainless Steel for durability and quality
  • Compatible with a center stand
  • Uses factory exhaust brackets to mount
  • Made in the USA

Download Install Guide Here

To get the maximum Performance upgrade on your Triumph Bonneville T100 or T120, try our Competition Header "X-Pipe" alongside the Predator Pro 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
BC902-120-P (Polished)

2017+ Triumph Bonneville T100

2016+ Triumph Bonneville T120

BC902-120-B (Black)

2017+ Triumph Bonneville T100

2016+ Triumph Bonneville T120

To clarify, this product will not fit the "Air Cooled" Bonneville T100 which we refer to as the "Bonneville EFI." If you are looking for Sleeper Pro for that model, visit this page.

Included Components:

    • Left and Right Sleeper Pro Slip-on Exhausts
    • (2) Stainless Band Clamps

      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.

      Q: What happened to the previous Sleeper? Why are they now called the "Pro" model?

      A: After 100s of hours of R&D with the previous Sleepers we've been able to improve the overall quality and performance. The primary difference is that the Pro version is 100% Stainless Steel, from the internal Louvered Baffle System to the body, brackets and mounting hardware. 

      Hear from real customers