Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust header and Rear Silencer, UK Made

The benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer from Max Torque Cans is the definitive British-made performance upgrade for Benelli small-capacity riders who are serious about shedding weight, freeing up power, and hearing their machine the way it was always meant to sound. Handcrafted right here in the UK from premium T304 stainless steel, this complete package pairs a precision-engineered de-cat down-pipe header with your choice of rear silencer — giving you everything you need to transform your Benelli in a single, well-priced kit.

Whether you ride the TNT125, the TNT135, the Tornado, or the +TNT Naked, you will know that the standard exhaust is one of the heaviest and most restrictive components on the bike. The factory unit is bloated with a catalytic converter box that chokes exhaust gas flow and adds unnecessary mass. Our benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer eliminates that restriction entirely, replacing it with a free-flowing stainless header that lets your engine breathe properly for the first time.

Why Choose the Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust Header and Rear Silencer from Max Torque Cans?

The answer is simple: no other exhaust on the market matches this combination of quality, value, and genuine performance gain for these Benelli models. Max Torque Cans has been producing exhausts for British and European motorcycles for years, and every single unit leaves our workshop having been carefully checked before it goes into the post. This is not a far-eastern import dressed up with a sticker — this is a proper, UK-manufactured performance exhaust built to last.

Here is what makes our kit stand out from anything else available for these bikes:

• Material: T304 grade stainless steel throughout — corrosion-resistant, durable, and built to handle the British climate without rusting away after one winter.
• Weight Saving: The standard down-pipe weighs a hefty 3.4 kg. Our header weighs just 1.1 kg. That is a saving of 2.3 kg from a single component — significant on a lightweight machine like the TNT125 or TNT135.
• De-Cat Design: The factory catalytic converter box is completely removed, allowing exhaust gases to flow freely and efficiently from the engine to the rear silencer.
• OEM Lambda Sensor Boss: The header comes complete with an O2 lambda sensor boss, so you can refit your standard sensor without any fuss or modification.
• Free Removable DB Killer: Every kit includes a complimentary removable baffle (DB killer), giving you full control over your sound levels depending on where and how you ride.
• Choice of Rear Silencer: Select the rear silencer that suits your style and riding requirements — all options are priced inclusive of the necessary fittings.
• Gasket-Free Fitment: The down-pipe connects to the rear silencer without the need for a gasket. Simply use a standard silicone-based sealant to achieve a clean, gas-tight seal.

Fitment Details for the Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust Header and Rear Silencer

One of the most important things to know about this kit is how cleanly it fits. The header has been designed to mirror the routing of the standard down-pipe exactly, so there is no cutting, no bracket fabrication, and no head-scratching required. It bolts straight onto the engine using your existing fixings, sits in the same position as the original, and connects directly to the standard rear silencer if you choose not to upgrade that section at this point.

The benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer is compatible with the following models:

• Benelli TNT125
• Benelli TNT135
• Benelli Tornado
• Benelli +TNT Naked

If you are unsure whether this kit fits your specific year or variant, please get in touch with us before ordering. We are always happy to confirm compatibility and make sure you receive exactly the right product for your bike.

Installation Notes for Your Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust Header and Rear Silencer

Installation is straightforward for anyone with basic mechanical confidence and a standard set of tools. Here are a few practical tips to ensure a smooth fit:

• Allow the engine to cool completely before you begin. Working on a hot exhaust is dangerous and makes the job harder than it needs to be.
• Remove the standard down-pipe and catalytic converter box. Keep the OEM lambda sensor — you will be refitting it into the boss on our new header.
• Offer up the new header and ensure it seats correctly at the engine port. Finger-tighten the fixings first to allow for minor adjustment before fully torquing everything down.
• At the joint between the down-pipe and your rear silencer, apply a bead of standard silicone-based sealant rather than using a gasket. Allow this to cure before starting the engine.
• Refit the lambda sensor into the provided boss and reconnect the sensor wiring.
• Start the engine and check for any leaks at the header joint. A short heat cycle will help the sealant fully set.

Our exhausts are manufactured to deliver maximum power gains without requiring any fuelling changes under standard conditions. However, if your Benelli is already running an aftermarket air filter or any other performance modification alongside this benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer, then having the fuelling mapped or adjusted will always complement the engine’s performance and efficiency further.

Performance and Power Gains

Removing the restrictive standard cat box and replacing the heavy factory down-pipe with our free-flowing stainless header makes a genuine, noticeable difference to how the bike pulls through the rev range. The improved exhaust gas scavenging helps the engine breathe more efficiently, and combined with the dramatic weight saving, the overall riding experience feels noticeably sharper and more responsive. The benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer is, without question, one of the most cost-effective performance modifications you can make to these Benelli models.

Pair this kit with the Benelli TNT125 & TNT135 Tornado +TNT Naked Bash Plate to further protect your investment and keep the underside of your machine looking clean and purposeful.

Frequently Asked Questions

Will I need to remap the bike after fitting the benelli tnt125 tnt135 tornado +tnt naked de-cat down-pipe exhaust header and rear silencer?

In most cases, no. Our exhausts are designed to work with the standard fuelling without requiring any ECU changes. If you have additional modifications such as an aftermarket air filter, a remap is advisable to get the best out of the combination, but for a standard bike it is not necessary.

Can I use my existing rear silencer with this header?

Yes. The down-pipe is designed to connect directly to the standard OEM rear silencer, so if you want to upgrade in stages, you absolutely can. Of course, pairing our header with one of our performance rear silencers will give you the best overall result.

Does the kit include everything I need for installation?

The kit includes the T304 stainless header, your chosen rear silencer with all necessary fittings, the OEM-compatible lambda sensor boss, and a free removable DB killer baffle. You will need to supply your own silicone sealant for the pipe joint, but everything else is included.

Is the DB killer removable after fitting?

Yes, absolutely. The baffle is fully removable, so you can switch between a quieter, road-legal configuration and a more open sound depending on your preference and riding environment.

If you are looking for the header-only option, take a look at our Benelli TNT125 TNT135 Tornado +TNT Naked De Cat Down-Pipe Exhaust header page for further details and accessories. You may also want to consider our Benelli TNT125 & TNT135 Tornado +TNT Naked Ø32mm De Cat Down-Pipe if you are after an alternative bore size to suit your specific build requirements.