Polished Sleeper Pro™ for Bonneville T100

Polished Sleeper Pro™ for Bonneville T100
For those looking for the ultimate retro exhaust, the British Customs Sleeper Pros are the answer.

Availability: In stock

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This product is not for sale in California and use is restricted for closed course competition only. Not intended for street use on any pollution controlled motor vehicle. Any order constitutes Buyers offer to Seller and agrees to the Terms and Conditions stated here upon purchase or acceptance.

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For those looking for the ultimate retro exhaust, the British Customs Sleeper Pros are the answer. The Sleeper Pros feature the true vintage look and sound that gave the original Sleepers their notoriety, but include a number of improvements. The Sleeper Pros have a revolutionary one-piece 304 stainless steel body that improves their durability and eliminates the need for ugly seams that usually come on hand-welded exhaust systems. To improve their performance, the Sleeper Pros have innovative HVO™ technology that emphasizes uninterrupted airflow to increase horsepower. The authentic retro sound back and better than ever with the new Sleeper Pro design, too. Best of all, these slip-ons are quick and easy to install on Triumph Bonneville T100 with VIN greater than 437493. 


  • Increased horsepower
  • Authentic retro exhaust tone
  • Revolutionary one-piece body made from 304 stainless steel for durability and quality
  • Innovative HVO™ technology designed to improve performance through uninterrupted airflow
  • Made in USA

Fits: Triumph Bonneville T100 EFI. Does not fit Bonneville SE/MAG. Please confirm the last 6 digits of the bikes VIN for proper fitment

This part fits the following models
Triumph Bonneville T100 EFI - 2009-2016
*Refer to Description in event of VIN specific fitment

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Q & a

Product Questions

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Good morning, What are the differences compared to the old model Sleeper? Thanks
The all new Pro edition uses the superior Sleeper design yet with improvements like:

*HVO (High Velocity Output):

This technology increases efficiency, performance & HP by providing a design that allows for uninterrupted airflow with more cubic-feet per minute than standard multi-chamber/muffler designs.

*UBC (Unit Body Construction):

No other exhaust manufacturers employed this new revolutionary design. Standard muffler bodies are created by rolling multiple cones from separate sheets of metal and welding them together. UBC on the other hand allows for the creation of a one-piece body which is seamless with no display of weld-lines. Putting the UBC to the test, this design has improved strength, rigidity and durability and has a lower chance of material defects.

*Sound Improvements:

Our new Pro systems offers a unique-throaty tone. Imagine the predecessor exhaust tone with a better growl/punch. The average sound range will be 98dB
Customer Support answered on October 6, 2016
Is this available in black?
We are currently not offering this in black, but if you order a set of these mufflers, you can take it to you local ceramic coater and have them done that way!
Customer Support answered on October 11, 2016
Do I need to do any performance modifications to the bike before I would install these?
Performance mods are not required but a remapping/tune will be required.However, we do recommend the Air-injection removal kit to ensure a cooler running system that lets your bike run smoother and an airbox removal kit to get the most out of your engine.
Customer Support answered on October 17, 2016