Benelli BN125 De-Cat Down-Pipe header & Exhaust UK Made

The benelli bn125 de-cat down-pipe header & exhaust uk made by Max Torque Cans is one of the most rewarding bolt-on performance upgrades you can fit to your Benelli BN125, delivering a genuine improvement in exhaust gas flow, a meaningful weight reduction, and the reassurance of British craftsmanship at every weld. If you want to wake your BN125 up and shed unnecessary kilograms in the process, this is exactly the upgrade your bike has been waiting for.

The standard down-pipe fitted to the Benelli BN125 from the factory is a restrictive, heavy piece of kit that throttles the engine’s natural breathing. Weighing in at a hefty 7 kg, it is one of the first components any performance-minded rider should look to replace. The benelli bn125 de-cat down-pipe header & exhaust uk made tips the scales at just 3 kg when paired with a silencer of your choice — a saving of 4 kg in a single swap. On a lightweight 125, that kind of reduction is genuinely transformative, improving handling, agility, and overall feel from the very first ride out.

Every unit is hand-crafted right here in the United Kingdom using T304 stainless steel, one of the most durable and corrosion-resistant materials available for performance exhaust manufacture. Unlike cheaper imported alternatives that rust, distort, or fail prematurely, T304 stainless holds its integrity through heat cycles, road salt, and the full force of British weather. This is a component built to last the life of your machine.

Key Features of the Benelli BN125 De-Cat Down-Pipe Header & Exhaust UK Made

Every detail of the benelli bn125 de-cat down-pipe header & exhaust uk made has been considered with the real-world rider in mind. Here is exactly what you get when you order from Max Torque Cans:

• T304 British-made stainless steel construction — durable, rust-resistant, and built for long-term reliability
• De-cat design — removes the restrictive catalytic converter to improve exhaust gas flow and unlock more performance
• Exact OEM fitment — fits precisely like the standard down-pipe with no modifications required
• Includes O2 Lambda Sensor Boss — allows you to refit your standard OEM sensor without any cutting or fabrication
• 4 kg weight saving over the standard factory component
• Compatible with rear silencers of your choice — pair it with any aftermarket can to complete your build
• No fuelling alterations required for standard setups — fit it and ride

The removal of the catalytic converter allows exhaust gases to escape more freely, reducing back pressure and enabling the engine to expel spent gases far more efficiently. The result is a more responsive throttle, improved mid-range pull, and a much more characterful exhaust note — everything you want from a 125 that punches well above its weight. The benelli bn125 de-cat down-pipe header & exhaust uk made genuinely transforms the way the BN125 breathes, responds, and sounds, making every ride a more engaging experience.

Fitment Details for the Benelli BN125 De-Cat Down-Pipe Header & Exhaust UK Made

This down-pipe has been specifically designed and manufactured to fit the Benelli BN125, replicating the mounting points and dimensions of the original factory header precisely. Installation is straightforward for anyone with a basic mechanical understanding and a standard set of tools. The benelli bn125 de-cat down-pipe header & exhaust uk made bolts directly into position, connecting seamlessly to a rear silencer or can of your choice at the back end.

One important fitment note: please use a normal silicone-based sealant in place of the factory gasket to achieve a proper gas-tight seal. This is a simple step that makes a real difference to performance and ensures there are no unwanted leaks at the joint. Apply a thin, even bead around the mating surface, bring the components together firmly, and allow the sealant to cure fully before starting the engine.

The included O2 Lambda Sensor Boss means your standard OEM oxygen sensor can be refitted exactly as it was. This keeps your engine management system happy and ensures the bike runs cleanly straight out of the box — no warning lights, no additional mapping required on a standard machine.

Installation Tips for the Benelli BN125 De-Cat Down-Pipe Header & Exhaust UK Made

Follow these practical steps to get the very best from your new performance exhaust and avoid common pitfalls during fitting:

• Allow the engine to cool completely before beginning removal of the factory down-pipe
• Use a penetrating fluid on any corroded bolts before attempting removal to avoid rounding or snapping
• Apply silicone-based sealant — not a gasket — to achieve a gas-tight seal at the header joint
• Refit your OEM O2 Lambda Sensor into the provided sensor boss — do not leave it disconnected
• Torque all fixings to manufacturer specifications and double-check after the first heat cycle
• If you are running additional modifications such as an aftermarket air filter, consider a professional fuel mapping session to maximise the gains

MTC exhausts are engineered to deliver strong performance gains without the need to alter fuelling on a standard bike. The benelli bn125 de-cat down-pipe header & exhaust uk made is no different — fit it, seal it, and go. If your BN125 is running an aftermarket filter or other modifications alongside the de-cat, having the fuelling professionally mapped will complement performance further and help the engine breathe at its absolute best across the entire rev range.

Frequently Asked Questions

Will this fit my Benelli BN125 without any modifications?

Yes. The benelli bn125 de-cat down-pipe header & exhaust uk made is designed as a direct OEM replacement, fitting exactly where the standard down-pipe sits. No cutting, welding, or bracket modifications are needed whatsoever.

Do I need to remap my bike after fitting this down-pipe?

For a standard, unmodified Benelli BN125, no remap is required. MTC exhausts are manufactured to deliver strong performance on a standard setup. If you are also running an aftermarket air filter or other performance modifications, a fuel mapping session is recommended to extract every last gain from your bike.

What silencer can I pair with this down-pipe?

The benelli bn125 de-cat down-pipe header & exhaust uk made is compatible with a rear silencer or can of your choice. Max Torque Cans offers a wide range of performance cans to complete the setup — browse our full range to find the ideal match for your BN125.

Why use silicone sealant instead of a gasket?

A good quality silicone-based sealant creates a more reliable gas-tight seal than a standard gasket in this application, reducing the risk of exhaust gas leaks at the joint and ensuring the best possible performance from your new down-pipe.

How much weight will I save?

The benelli bn125 de-cat down-pipe header & exhaust uk made weighs just 3 kg compared to the standard factory component at 7 kg, giving you a genuine 4 kg saving — a significant difference on a lightweight 125cc machine that you will feel immediately in the way the bike handles and responds.

If you ride a Benelli TNT125 or TNT135 and are looking for a similar upgrade, take a look at our Benelli TNT125 TNT135 Tornado +TNT Naked De Cat Down-Pipe Exhaust header — another British-made performance upgrade built to the same exacting standards as the benelli bn125 de-cat down-pipe header & exhaust uk made. Every component in the Max Torque Cans range is made to order, quality checked, and dispatched directly from our workshop here in the United Kingdom.

Order with complete confidence from Max Torque Cans — a UK manufacturer with a proven track record in performance exhausts for small-capacity motorcycles. The benelli bn125 de-cat down-pipe header & exhaust uk made represents genuine quality you can see, feel, and hear the moment it is fitted to your bike.