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 represents the ultimate British-engineered performance upgrade for owners of Benelli’s popular small-capacity naked bikes who demand more power, less weight, and a soundtrack that truly reflects the sporting character of their machine.

Handcrafted in the UK from premium T304 stainless steel, this comprehensive exhaust kit pairs a precision-engineered de-cat down-pipe header with your choice of rear silencer, delivering everything you need to transform your Benelli’s performance, handling, and character in one expertly priced package that punches well above its weight class.

Whether you ride the TNT125, the TNT135, the Tornado, or the +TNT Naked variant, you’ll already know that the standard factory exhaust system is one of the heaviest and most restrictive components bolted to your bike. The OEM unit is burdened with a bulky catalytic converter box that strangles exhaust gas flow and adds unnecessary kilograms to a machine that thrives on being light and agile.

Our de-cat system eliminates that bottleneck entirely, replacing the restrictive factory plumbing with a free-flowing stainless steel header that allows your engine to breathe properly and deliver the performance Benelli originally intended before emissions regulations took their toll.

Why the Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust Header and Rear Silencer Stands Apart

No other exhaust system available for these Benelli models combines this level of build quality, genuine performance enhancement, and outstanding value for money. Max Torque Cans has earned its reputation producing exhausts for British and European motorcycles for years, and every single unit that leaves our workshop has been meticulously inspected before dispatch.

This is not a mass-produced far-eastern import with a UK sticker hastily applied — this is a proper, UK-manufactured performance exhaust engineered to last and built to deliver real-world results on British roads.

Here’s what sets our kit apart from anything else on the market for these machines:

• Material: T304 grade stainless steel throughout — highly corrosion-resistant, exceptionally durable, and engineered to withstand the harsh British climate without rusting away after a single winter season.
• Weight Saving: The standard factory down-pipe weighs a hefty 3.4 kg. Our replacement header weighs just 1.1 kg. That’s a dramatic saving of 2.3 kg from a single component — highly significant on a lightweight machine like the TNT125 or TNT135 where every gram counts.
• De-Cat Design: The factory catalytic converter box is completely removed, allowing exhaust gases to flow freely and efficiently from cylinder head to rear silencer without restriction.
• OEM Lambda Sensor Boss: The header comes complete with an O2 lambda sensor boss, enabling you to refit your standard sensor without any modifications, bodges, or adaptors required.
• Free Removable DB Killer: Every kit includes a complimentary removable baffle (DB killer), giving you complete control over sound levels depending on where and how you ride.
• Choice of Rear Silencer: Select the rear silencer that suits your style, budget, and riding requirements — all options are priced inclusive of necessary fittings and hardware.
• Gasket-Free Fitment: The down-pipe connects to the rear silencer without requiring a traditional gasket. Simply apply standard silicone-based sealant to achieve a clean, gas-tight seal that won’t blow out.

Fitment and Compatibility: Which Bikes Work with the Benelli TNT125 TNT135 Tornado +TNT Naked De-Cat Down-Pipe Exhaust Header and Rear Silencer?

One of the most impressive aspects of this exhaust system is how cleanly and precisely it fits. The header has been designed to follow the exact routing of the standard factory down-pipe, meaning there’s no cutting, no bracket fabrication, and no head-scratching involved during installation. It bolts straight onto the engine using your existing fixings, sits in the same position as the original component, and connects directly to either the standard rear silencer or one of our performance options depending on your chosen configuration.

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

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

If you’re unsure whether this kit fits your specific year, variant, or regional specification, please contact us before placing your order. We’re always happy to confirm compatibility and ensure you receive exactly the right product for your machine. For riders who prefer to upgrade in stages or have specific build requirements, you might also want to explore our Benelli TNT125 TNT135 Tornado +TNT Naked De Cat Down-Pipe Exhaust header as a standalone component, or consider the Benelli TNT125 & TNT135 Tornado +TNT Naked Ø32mm De Cat Down-Pipe if you’re building for specific power characteristics.

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 practical tips to ensure a smooth, trouble-free fitting process:

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

Our exhausts are manufactured to deliver maximum power gains without requiring fuelling changes under standard operating conditions. However, if your Benelli is already running an aftermarket air filter, performance camshaft, or any other engine modifications alongside this system, having the fuelling professionally mapped or adjusted will always complement engine performance and efficiency further. For more information on motorcycle exhaust standards and testing procedures, the UK Vehicle Certification Agency provides comprehensive guidance on emissions compliance and vehicle modifications.

Performance Gains and Real-World Benefits

Removing the restrictive standard catalytic converter box and replacing the heavy factory down-pipe with our free-flowing stainless steel header makes a genuine, noticeable difference to how your bike pulls through the rev range. The improved exhaust gas scavenging helps the engine breathe more efficiently, while the dramatic weight saving transforms handling characteristics and throttle response.

Combined, these changes deliver a riding experience that feels noticeably sharper, more responsive, and considerably more engaging than the standard setup ever could. 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 and impactful performance modifications you can make to these excellent Benelli models, delivering benefits that far exceed the modest investment required.

Protect your investment further by pairing this exhaust kit with the Benelli TNT125 & TNT135 Tornado +TNT Naked Bash Plate, which shields vulnerable engine components and keeps the underside of your machine looking clean and purposeful even after spirited riding.

Frequently Asked Questions

Will I need to remap the bike after fitting this exhaust system?
In most cases, no. Our exhausts are designed to work with standard fuelling without requiring ECU changes. If you’ve installed additional performance modifications such as an aftermarket air filter or performance camshaft, a professional remap is advisable to extract maximum benefit from the combination, but for a standard bike it’s not necessary.

Can I use my existing rear silencer with this header?
Absolutely. The down-pipe is designed to connect directly to the standard OEM rear silencer, so upgrading in stages is entirely possible. Of course, pairing our header with one of our performance rear silencers will deliver the best overall results in terms of weight, sound, and power delivery.

Does the kit include everything needed for installation?
The kit includes the T304 stainless steel header, your chosen rear silencer with all necessary fittings, the OEM-compatible lambda sensor boss, and a free removable DB killer baffle. You’ll need to supply your own silicone-based exhaust sealant for the pipe joint, but everything else is included and ready to fit.

Is the DB killer removable after fitting?
Yes, the baffle is fully removable, allowing you to switch between