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

When it comes to upgrading your small-capacity machine, benelli performance superbike exhausts offer a genuine opportunity to transform both the character and capability of your TNT125, TNT135, Tornado, or Naked model. This British-made de-cat down-pipe exhaust header and rear silencer set represents a comprehensive performance solution engineered specifically for Benelli’s popular learner-legal and A1 licence-compatible models, delivering measurable gains in power, weight reduction, and that unmistakable superbike exhaust note that enthusiasts crave.

British Engineering Excellence in Benelli Performance Superbike Exhausts

Manufactured right here in the United Kingdom from premium T304 stainless steel, this exhaust system exemplifies the quality and precision that discerning riders expect from performance upgrades. The header and down-pipe are crafted to fit exactly as the standard OEM components, ensuring straightforward installation without modification to your Benelli’s frame or mounting points. What sets this system apart is its purposeful design: lighter construction, improved exhaust gas flow dynamics, and the removal of the restrictive catalytic converter that hampers performance on the factory setup.

The weight savings alone make a compelling case for this upgrade. Where the standard down-pipe tips the scales at a hefty 3.4 kilograms, our British-made replacement weighs just 1.1 kilograms—a remarkable 2.3-kilogram reduction. For smaller-displacement motorcycles like the TNT125 and TNT135, this weight saving has a genuinely noticeable impact on handling, acceleration, and overall agility. Reducing unsprung and mid-mounted mass improves the bike’s responsiveness and makes it feel considerably more nimble through corners and during spirited riding.

Complete System Specification and Fitment Details

This comprehensive exhaust package includes everything required for a professional installation. You receive a full stainless steel front pipe and header assembly, plus your choice of rear silencer—all options are priced inclusively with the necessary fittings and hardware. The header comes complete with an O2 lambda sensor boss, allowing you to refit your standard OEM sensor without any complications, ensuring your motorcycle’s fueling system continues to operate correctly and your engine management remains happy.

Each system also includes a free removable dB killer (baffle), offering versatility depending on your riding environment and local noise regulations. With the baffle installed, the exhaust remains road-legal and neighbour-friendly, whilst removal delivers that full, unrestricted exhaust note for track days or off-road use. The down-pipe is designed to fit directly to the standard rear silencer if you prefer a phased upgrade approach, though we strongly recommend the complete system for maximum performance gains and aesthetic cohesion.

Performance Gains from Premium Benelli Performance Superbike Exhausts

The primary objective of any performance exhaust is to liberate trapped power, and this system delivers precisely that. By removing the restrictive catalytic converter and optimising exhaust gas flow through improved pipe diameter and routing, the engine can breathe more freely. This translates directly into improved throttle response, stronger mid-range pull, and enhanced top-end performance—all crucial characteristics for extracting maximum enjoyment from smaller-displacement motorcycles.

What makes these benelli performance superbike exhausts particularly impressive is that they’re engineered to deliver power gains without requiring fueling modifications on an otherwise standard motorcycle. The system has been developed and tested to work harmoniously with the factory fuel injection mapping, meaning you can fit it and immediately enjoy the benefits without the expense of a custom dyno session or aftermarket fuel controller. That said, if you’ve already installed an aftermarket air filter or other breathing modifications, having your motorcycle’s fueling professionally optimised will always complement the exhaust upgrade and unlock the full potential of your engine’s performance and efficiency.

For riders serious about maximising their Benelli’s potential, pairing this exhaust system with complementary modifications creates a genuinely transformed motorcycle. Much like the proven approach used on larger-capacity machines with systems such as the Kawasaki Z1000 de-cat exhaust systems, removing catalytic restriction on smaller bikes yields proportionally significant gains.

Installation Guidance and Professional Tips

Installation of this exhaust system is straightforward for anyone with basic mechanical competence and appropriate tools. The down-pipe fits without requiring a gasket at the connection point—instead, we recommend using a quality silicone-based exhaust sealant in place of the factory gasket to create a reliable, gas-tight seal that accommodates thermal expansion and contraction during operation. This approach often provides superior sealing performance and simplifies future maintenance or removal.

Ensure all mounting hardware is checked and torqued to the manufacturer’s specifications, paying particular attention to the header-to-cylinder connection which experiences significant thermal cycling. Allow the sealant adequate curing time before starting the engine, and expect some initial smoke and smell as manufacturing oils and residues burn off during the first heat cycle—this is entirely normal and will disappear after a short break-in period.

Similar attention to detail in exhaust installation applies across all motorcycle platforms, whether you’re working on a Benelli TNT or fitting premium systems like the Kawasaki ZR900RS Cafe de-cat exhaust. Proper installation ensures optimal performance, longevity, and safety.

Understanding T304 Stainless Steel Quality in Benelli Performance Superbike Exhausts

Material selection is critical in exhaust manufacturing, and T304 stainless steel represents an excellent balance of durability, corrosion resistance, and performance characteristics. This austenitic chromium-nickel alloy contains approximately 18% chromium and 8% nickel, providing exceptional resistance to oxidation and corrosion even in the challenging environment of exhaust systems where extreme temperatures, condensation, and road salt constantly attack components.

T304 stainless steel maintains its structural integrity across a wide temperature range and resists warping and cracking better than mild steel alternatives. For British riders facing our notoriously variable weather conditions and year-round road salt exposure, this material choice ensures your investment maintains its appearance and performance for years to come. The natural finish of stainless steel also requires minimal maintenance—occasional cleaning is all that’s needed to keep the system looking pristine.

For riders interested in understanding more about stainless steel grades and their applications in performance exhaust systems, the World Stainless Association’s automotive applications guide provides comprehensive technical information about material properties and performance characteristics.

Frequently Asked Questions About This Exhaust System

Will this exhaust make my Benelli significantly louder? With the dB killer installed, the volume increase is moderate and typically road-legal. Removing the baffle produces a noticeably louder, more aggressive exhaust note suitable for track use.

Do I need to remap my ECU after fitting this system? On an otherwise standard motorcycle, remapping isn’t essential—the system is designed to work with factory fueling. However, if you’ve made other performance modifications, professional fueling optimisation is recommended.

Is this exhaust system road-legal in the UK? With the baffle fitted, the system typically meets UK noise regulations, though individual circumstances vary. For competition or track use, the baffle can be removed for unrestricted flow.

How difficult is installation for a home mechanic? With basic hand tools and mechanical understanding, installation is straightforward and can typically be completed in 1-2 hours.

What warranty coverage is provided? Please contact Carbon Can Co directly for specific warranty information on this British-manufactured product.

This Benelli TNT125, TNT135, Tornado, and Naked de-cat exhaust system represents exceptional value for riders seeking genuine performance enhancement, significant weight reduction, and that distinctive superbike exhaust character that transforms the riding experience. British engineering, premium materials, and purpose-driven design combine to deliver an upgrade that exceeds expectations across performance, quality, and aesthetic appeal.