British Customs

Sleeper Pro Slip On Exhaust

Name: Sleeper Pro Slip On Exhaust
Brand: British Customs
SKU: BC902-123-BR
Price: 699.95 USD
Availability: InStock

BC902-123-BR

$699.95

Vintage style "peashooter" exhaust for Triumph Bonneville models. Available for Bonneville T100, Bonneville T120, Bobber, and Speedmaster. More info below.

View Install Guide Here

The Sleeper Exhaust was originally designed in 2008, the peashooter design pays tribute to the 1960s and 70s factory Triumphs. The goal of the Sleeper was to increase the performance and improve the exhaust note while keeping close to the original Triumph aesthetic; more power with a toned down appearance, hence "Sleeper."

In 2017 the Sleeper Exhaust was redesigned and released as the Sleeper Pro. 9 years of design, testing, and customer feedback was used to develop the Sleeper Pro. The look and the sound has not changed, but the internals have been completely redesigned for additional durability and weight savings.

The Louvre core is part of the unibody stainless steel construction. The louver is now sealed within the exhaust allowing exhaust to flow free/undisturbed. In addition to the redesign of the louver core, the mounting brackets have been redesigned to be rubber mounted to isolate engine vibration transfer to the rider and reduce bracket fatigue. In general the redesigned pipe retained all that made the original popular while updating the design to benefit from 9 years of real world use.

Features and Benefits

Style - Peashooter design for increase performance that maintains classic look

Performance - Smoothes throttle response and increases performance by 2-5% depending on mapping and elevation

Factory Fit - Designed to bolt on to factory headers with common tools

Center Stand Compatible - Designed to accommodate Triumph OEM center stand

Specifications

Weight - 8.7 lbs

Installation Process

The Sleeper Pro Slip On Exhaust installs in under an hour with common tools. Simply remove the factory exhaust and bolt on the Sleeper Pro. Remapping is not required due to Triumphs "self-learning" ECU that can adapt to changes in the exhaust. When installing alongside our Competition Header it is highly recommended you seek professional help to re-tune the motorcycle.

Difficulty - Easy

Install Time - 30-60 minutes

Materials and Included Components

The Sleeper Pro Slip On Exhaust is manufactured from 304 Stainless Steel and includes all stainless steel exhaust clamps and mounting hardware.

Included Components:

Sleeper Pro Exhausts (pair)
Stainless Steel mounting hardware
Exhaust Gaskets (Bonneville T100/T120 models only)

British Customs attempts to match the factory header finish on each Slip On Exhaust. As part of the effort, we offer Black-coated pipes for the factory "BLACK" models, available from Triumph select years.

Please note: If you have a Bonneville T120, the same pipes will fit a Bonnevillle T120 Black. However, we offer them by model based on the finish of the factory header.

Please do not hesitate to contact us if you have any questions. We also offer an add-on coating service by special order for pipes not currently offered in black (2-6 week turnaround).

Thank you for your interest!

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Testimonials

After much research and watching/reading reviews I decided to purchase the Sleeper Pros. They shipped amazingly fast and the packaging was great. After fitting I cranked the T120 up and immediately smiled. A deeper more guttural note emitted at idle. Upon riding the difference really kicked in. Fantastic note especially when you hit 3000 revs and above - it turns the Bonny into a snarling beast. I am SO happy I bought these. Thank you
Chris, Bonneville T120

After a few hundred miles, I transformed the bike a bit and the 1st main change was an addition of the Sleeper Pros and the Xpipe from BC. The bike WOKE UP! MAJOR seat of the pants transformation and the entire rev range became usable. No more bogging at the 2k to 2400 rpm range. The bike feels and performs 100% better. It also sounds and looks AWESOME. Best money spent in a very long time!
Kebo, Bonneville T100

I am very happy indeed with these. They look more classic, and have a bit more of the traditional Triumph brap to them. Not super loud, but a bit louder, and overall a better sound I think.
Steve, Bonneville Bobber

I purchased the chrome polished sleeper pros for my Black T120 they literally took me 10minutes to change them over. I am more than pleased with the look and boy they sound good and the bikes performance feels better ,make sure you purchase new gaskets too you have to buy them separately.
[Note from BC: Due to this customer's review, we have updated the Sleeeper Pro to include factory Triumph exhaust gaskets.]
Kenny, Bonneville T120