TEC DUELLER 2-2 Big Bore Exhaust System – Street Twin 900, Street Cup 900, T100, T120


Awesome sound, more responsive.

Listen to our sound-test video below!

Designed and manufactured by us in 304 stainless 45mm tube.

The Big Bore pipes make your bike more responsive whilst saving considerable weight over the stock headers.

Completely bypasses Triumph’s CAT, de-restricting airflow from the engine and releasing a deeper sound.

The TEC marked silencers come supplied with TWO different sets of baffles: ‘Big-Bore’ baffles & ‘High-Flow’ baffles. Easy to swap out to modify your sound.

Additional 10-Hole quiet baffles can be supplied if chosen in the drop-down menu.

IMPORTANT – You MUST tell us on the notes of your order (at checkout) if your bike has a centre stand installed.  We will then ship it with the alternative fitting kit.

PLEASE NOTE – On these models, these headers & silencers can only be fitted as a full system due to the specified models using a different frame. It is not possible to fit only the headers, or only the silencers.  Similar slip-on silencers are available for the Street Twin/Cup only (please see our other listings)

Gaskets and fitting instructions included.

NOTE – On pre-2020 models, you can leave the Cat unit in place (but not connected) this allows a much quicker and easier fitting. Otherwise, the left lower frame rail needs to be loosened to allow the Cat to be removed.  We have a YouTube video showing how to remove the cat unit.

From 2021 Triumph has introduced new Euro 5 models and have started phasing in anti-tamper, welded on rear link pipes to the Cat unit on some models. If this is the case on your bike the Cat unit will have to be removed before installing the system.

THIS SYSTEM IS NOT TUV APPROVED OR E-MARKED.  As this system has no catalytic converter, it cannot be marked TUV approved. Silencers are laser marked EU noise legal only.



Customer Reviews

Based on 13 reviews
Dmitrijs Kosteckis

Looks nice and sounds good! Would be nice with black version!!!

Stéphane Ortiz
French user so review in french !

Bonjour, pots montés sur ma T120 de 2016 avec la chicane 10 trous. Fabrication très sérieuse et montage assez simple avec quelques bases de mécanique. A l'utilisation c'est GENIAL. Bruit tout à fait contrôlé et à faible allure c'est quasi le même niveau que l'origine. A l'accélération ça rugit rauque mais à un niveau encore une fois très contrôlé. On sent que le moteur respire et il prend ses tours beaucoup plus facilement, Génial. Monté avec un filtre à air DNA, un Booster plug, et j'ai shunté les sondes lambda. Le résultat est fantastique ! Ce n'est plus la même moto...Merci à Matt

Geoff Dowsett
Tec Dueller 2-2 Big Bore Exhaust

Excellent exhaust system for my T120. With the choice of 3 baffles it really enhances the sound of the bike. I removed the Cat Converter and added the Tec Bike engine bash plate which was really well made. The fitting of the new pipes was straight forward with easy to follow instructions. Everything was well made and excellent value. Fully recommend these to anyone thinking of a change of pipes.

Tec dueller 2 into 2 does Go.

I bought these after reading various reviews.
Well I am truly not disappointed they look great and sound brilliant especially when opened up quiet at low running around town. open it up and the lion roars.
All the weld joints are neat and fit well together a bit of a fiddily fit but no need to rush .my bike has 14k on clock it idled unevenly and just felt choked up and vibrated hence I went for a full decat setup.
What a difference it has made, bike idles smoothly and revs free and the vibrations are gone.there are more expensive setups out there but this is truly value for money.these were fit last weekend 11/12/21 so is a very upto date review my early Christmas present for myself.

David Wilkinson
Dueller big bore exhaust

Great service and very happy with exhaust. Good instructions for easy fit.