Sleeper Pro™ Slip On Exhaust for Bonneville Bobber


British Customs Sleeper Pro for Bonneville Bobber

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 Bobber, we offer the Sleeper Pro in Brushed or Black (for Bonneville Bobber 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
  • Made in the USA

To get the maximum Performance upgrade on your Triumph Bonneville Bobber, 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.

Download Install Guide Here



Part Number Model Fitment
BC902-123-BR (Polished)

2017+ Triumph Bonneville Bobber

2018+ Triumph Bonneville Bobber Black

BC902-120-B (Black)

2017+ Triumph Bonneville Bobber

2018+ Triumph Bonneville Bobber Black


Included Components:

    • Left and Right Sleeper Pro Slip-on Exhausts
    • (2) Stainless Band Clamps
    • (2) Rubber Inserts
    • (4) Stainless Steel Mounting Spacers

      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