suzuki gsxr 125 de-cat down-pipe header & exhaust – Suzuki GSXR 125 De-Cat Down-Pipe header & Exhaust

Suzuki GSXR 125 De-Cat Down-Pipe header & Exhaust suzuki gsxr 125 de-cat down-pipe header & exhaust side view

Suzuki GSXR 125 De-Cat Down-Pipe header & Exhaust suzuki gsxr 125 de-cat down-pipe header & exhaust detail

Suzuki GSXR 125 De-Cat Down-Pipe header & Exhaust suzuki gsxr 125 de-cat down-pipe header & exhaust close-up

Stainless satin oval satin outlet cardiff

Suzuki GSXR 125 De-Cat Down-Pipe header & Exhaust

Price range: £ 177.16 through £ 264.02

Material

Shape

Outlet

Type

Race
Road Legal

Clear

SKU: N/A Categories: Suzuki, Suzuki GSXR 125 Tags: bespoke, exhausts, ExhaustSystems, GSXR125, LoudPipesSaveLives, Motorbike, Motorcycle, performance, Suzuki, systems

The suzuki gsxr 125 de-cat down-pipe header & exhaust from Max Torque Cans is the single most impactful performance upgrade you can bolt onto your lightweight Suzuki — and it is designed, engineered, and built right here in the UK. If you have ever felt your GSXR 125 has more to give than the factory pipework allows, you are absolutely right. The standard setup is heavy, restrictive, and deliberately engineered around emissions compliance rather than outright performance. This British-made replacement changes all of that, delivering significantly improved exhaust gas flow, a genuine weight saving, and a sharper, more responsive ride from the very first moment you twist the throttle.

The factory catalytic converter alone is responsible for a substantial amount of restriction on the GSXR 125. It chokes the engine’s natural breathing ability and adds unnecessary mass to a motorcycle that rewards lightness above almost everything else. By fitting the suzuki gsxr 125 de-cat down-pipe header & exhaust, you remove that restriction entirely and replace the bulky OEM unit with a precision-engineered T304 stainless steel header that flows freely, weighs dramatically less, and is built to last through years of hard British riding — whatever the weather throws at it.

Why the Suzuki GSXR 125 De-Cat Down-Pipe Header & Exhaust Transforms Your Ride

The headline figure tells the story better than anything else. The standard Suzuki GSXR 125 downpipe tips the scales at a substantial 7 kg. Our replacement downpipe and silencer combined weigh just 3 kg. That is a saving of 4 kg of real, unsprung weight removed from your motorcycle in a single afternoon. On a machine of this size and class, 4 kg is genuinely transformative. You will feel it in acceleration, in how the bike carries itself through corners, and in the immediate, eager way it responds to your inputs. It is not a marginal gain — it is one of the most impactful single upgrades available for a 125.

Beyond the weight reduction, the suzuki gsxr 125 de-cat down-pipe header & exhaust delivers improved exhaust gas scavenging, better mid-range response, and a soundtrack that actually does justice to the machine underneath you. The factory silencer is muted by design. This header, paired with any can from the Max Torque Cans range, gives the GSXR 125 the voice it always deserved.

Key Features of the Suzuki GSXR 125 De-Cat Down-Pipe Header & Exhaust

British-made T304 stainless steel construction — engineered to withstand high temperatures, resist corrosion, and maintain its appearance across years of demanding use in all conditions.
De-cat design — completely removes the standard catalytic converter to eliminate exhaust restriction and unlock significantly improved gas flow rates through the header.
Direct OEM fitment — follows the exact same routing and mounting points as the standard header. No cutting, drilling, or fabrication required.
Ø45mm inlet — compatible with the full range of Max Torque Cans silencers, giving you complete flexibility over your final can choice.
Includes O2 Lambda Sensor Boss — allows your standard OEM Lambda sensor to thread straight back in cleanly, keeping the fuelling management system fully intact.
4 kg weight saving — compared to the standard downpipe and cat assembly, delivering a handling and performance benefit you will feel on every single ride.
No fuelling remap required as standard — engineered to deliver strong power gains without requiring any changes to the factory fuel map.

Fitment and Installation

Fitting the suzuki gsxr 125 de-cat down-pipe header & exhaust is a straightforward job for any rider with basic mechanical ability and a standard set of tools. The header is a direct bolt-on replacement for the factory pipework, using the same routing and identical mounting points as the OEM unit. There is absolutely no need to modify the frame, cut any brackets, or carry out any fabrication work whatsoever.

One important installation note: please use a high-temperature silicone-based sealant in place of the factory gasket at the header joint. This creates a reliable, gas-tight seal between the downpipe and your chosen can or silencer. High-temperature silicone sealant is readily available from any automotive supplier. Apply it evenly around the joint, allow it to cure fully as directed by the manufacturer, and you are ready to ride. It is a simple step, but it is worth doing correctly from the outset.

The downpipe is supplied as a complete, ready-to-fit unit with the Lambda sensor boss already incorporated. Your OEM sensor threads straight back in without any adapters or modifications. Once installed, the suzuki gsxr 125 de-cat down-pipe header & exhaust pairs with any silencer featuring a Ø45mm inlet — which covers every can in the Max Torque Cans range. Select your preferred can at checkout and we will confirm compatibility before your order leaves our workshop.

Do I Need to Remap My GSXR 125 After Fitting the Suzuki GSXR 125 De-Cat Down-Pipe Header & Exhaust?

This is the question we are asked more than almost any other, and the honest answer is: not necessarily. The suzuki gsxr 125 de-cat down-pipe header & exhaust is specifically engineered to deliver strong performance gains without requiring any changes to the standard fuel map. The vast majority of riders fit this header and ride away completely satisfied, without touching the fuelling at all.

That said, if you have already fitted an aftermarket air filter or you are running additional performance modifications, having the fuelling reviewed by a qualified technician will always complement the gains this header provides. A properly optimised fuel map works in harmony with improved exhaust flow to maximise efficiency and power across the full rev range. For most riders it is not essential, but for those chasing every last fraction of performance, it is absolutely worth considering.

Frequently Asked Questions

Will this de-cat header pass an MOT?

This product is intended for closed-road, competition, or off-road use where emissions regulations do not apply. Removing the catalytic converter from a road-registered motorcycle may affect its MOT emissions test result. Always check the regulations applicable to your specific use case before fitting any de-cat product to a road-legal machine.

Which can should I pair with the suzuki gsxr 125 de-cat down-pipe header & exhaust?

Any silencer with a Ø45mm inlet will be fully compatible with the suzuki gsxr 125 de-cat down-pipe header & exhaust. We offer a wide range of options at Max Torque Cans to suit different preferences — from refined and understated to bold and aggressive. If you are unsure which can suits your GSXR 125, get in touch and our team will point you in the right direction without any fuss.

How long will the header last?

T304 stainless steel is an exceptional material for high-temperature applications. It resists corrosion, discolouration, and fatigue significantly better than mild steel or chrome alternatives. With proper installation and basic care, your suzuki gsxr 125 de-cat down-pipe header & exhaust will deliver years of reliable, great-sounding performance regardless of what the British weather has in store.

Is this header compatible with all GSXR 125 model years?

This header is designed as a direct OEM replacement for the Suzuki GSXR 125. If you have any doubt about compatibility with your specific model year, please contact us before ordering and we will confirm fitment for you without any fuss.

More British-Made Performance from Max Torque Cans

If you ride other machines in the Suzuki family and you are looking for similarly high-quality British-made performance upgrades, explore our SUZUKI GSXR 600-750 K6-K7 2006-2007 performance can — another outstanding product from the Max Torque Cans workshop. We also cater for larger machines with the SUZUKI GSXR1000 K7 K8 2007 – 2008 Twin Silencers, and for those privileged enough to own one of the finest production motorcycles ever built, the SUZUKI GSX1300R HAYABUSA 2021- GEN 3 performance can is available too.

At Max Torque Cans, everything we make is built around one simple goal: giving your motorcycle the performance and soundtrack it genuinely deserves. The suzuki gsxr 125 de-cat down-pipe header & exhaust is lightweight, beautifully made, and engineered to transform how your GSXR 125 feels, sounds, and performs — every single time you ride it.

Material	White, Polished Stainless Steel, Satin Stainless Steel, Titanium, Carbon, Black, Blue
Shape	Oval
Outlet	GP Pro Outlet, Single Outlet
Type	Race, Road Legal

Outlet

	Single Outlet – single 54mm diameter rolled outlet. Best performing outlet in a road-legal /race. Simple and effective.
	Twin Outlet – twin 40mm diameter rolled outlets. This has the ‘best of both worlds’, quieter than the single outlet with baffles inserted, and Louder than the single outlet with the baffles removed. (Both outlets working in the road-legal form).
	Carbon Outlet -Our superior outlet range with a choice of a smooth, sleek Oval, ultra-modern Tri-oval, and now our all-new for 2020 Round outlet. These outlets give your exhaust the distinctive, expensive finish without the expensive price tag.
	GP Pro Outlet – Comes with a large 63mm diameter slash-cut finish, and can come with and without road-legal baffles.
	The Evo Outlet – Is a new, modern 2020 design. The sleek, tapered lines compliment any road – track or race bike

Materials

Our Exhausts are internally constructed in stainless steel and the outer sleeve can be made in stainless steel, titanium or carbon fiber. MTC ONLY uses the best grade materials.

	Polished Stainless Steel – Grade T304 + T409 (a single slip-on exhaust normally weighs 1.9 kilos).
	Satin Stainless Steel – Grade T304 + T409 (a single slip-on exhaust normally weighs 1.9 kilos).
	Titanium – Grade 2 + 3 mill finish (a single slip-on exhaust normally weighs 1.7 kilos).
	Carbon Fibre – 4 x 4 twill prepreg autoclave cured, foiled lined (a single slip-on exhaust normally weighs 1.2 kilos).

Our coloured exhausts have stainless steel sleeves that are painted prior to assembly. The item is electrostatically coated with high-grade polyester powder and cured at 200º-220º deg C giving a durable, smooth and U.V. resistant finish with excellent colour retention. Colours available are matt black, gloss white and gloss blue.

Shape

	Round GP – Ø98mm Our smaller round exhaust shape and is usually 250mm Long (this exhaust shape is perfect for the customer who wants a louder sound on a standard sized bike).
	Round – Ø110mm Our Normal-sized exhaust shape and can come in sizes from 250mm to 450mm Long. (This is our standard sized exhaust and performs excellently on most bikes).
	Oval – working from 110mm Ø is sized 98mm wide and 122mm High and can come in sizes from 250mm to 450mm Long. (This is our slimmest design, for inverted under-seat exhausts, or for customers/Racers who need the slimmest streamlined spacers to ride through).
	Tri Oval – working from 110mm Ø is sized 98mm wide and 122mm High and can come in sizes from 250mm to 450mm Long. (This is our Premium shaped design. (Designed back in 2002′ our company was the first in the UK to produce this exclusive shape, have a look around and see how many UK companies have copied us!!).

Extra Info

Our Exhausts are manufactured to give maximum power without the need to alter the fueling but, if you have an aftermarket air filter and/or a de-cat, then having the bikes fueling looked at will always compliment the engine’s performance and efficiency.

To Make sure that you are shopping for the correct Model exhaust here is some information about this model.
The Benelli brand has launched the new 2019 Benelli BN 125 Naked Bike, which is compact in style and is designed to capture everyone’s heart. It an ideal bike for commuters who want to move quickly through heavy traffic and those riders who want to have fun with others on open roads. The review of 2019 Benelli BN 125 Naked Bike with its pictures and specifications are given below.

2019 Benelli BN 125 Naked Bike – Features
Engine
The 2019 BN 125 features the powerful 125 ccm engine with a single-cylinder and four-stroke technology. An instant power of 11.1 hp and 10 Nm of torque makes it an ideal one. The compression ratio of 9.8:1 makes it unique, while the bore to stroke ratio of 54 mm and 54.5 mm ensures an ultimate performance better than 2018 Benelli BN 125. The best part is that its engine is both oil and air-cooled, which means it can run longer. The new 5-speed transmission gives the best gear shifting experience of all times.

Chassis
The trestle in steel tubes makes the frame of 2019 Benelli BN 125 much stronger. Its suspension system ensures to provide the best damping force. The front section contains the telescopic fork suspension system while the rear has rear swing arm with central shock absorber with spring –preload adjustment. The braking system consists up of a single disc on both front and rear sections. The tires guarantee to provide a fantastic grip over slippery surfaces.

2019 Benelli BN 125 Naked Bike – Technical Specifications
Engine & transmission
Displacement: 125.00 ccm (7.63 cubic inches)
Engine type: Single cylinder, four-stroke
Power: 11.10 HP (8.1 kW)) at 9500 RPM
Torque: 10.00 Nm (1.0 kgf-m / 7.4 ft.lbs) at 7000 RPM
Compression: 9.8:1
Bore x stroke: 54 mm x 54.5 mm (2.1 inches x 2.1 inches)
Fuel system: Injection
Lubrication system: Wet sump
Cooling system: Oil & air
Gearbox: 5-speed
Final drive: Chain

Chassis, suspension, brakes & wheels
Frame type: Trestle in steel tubes
Front suspension: Telescopic fork
Front-wheel travel: 111 mm (4.4 inches)
Rear suspension: Rear swing arm including central shock absorber with spring pre-load adjustment
Rear-wheel travel: 40 mm (1.6 inches)
Front tire: 110/80-17
Rear tire: 130/70-17
Front brakes: Single disc
Front brakes diameter: 260 mm (10.2 inches)
Rear brakes: Single disc
Rear brakes diameter: 240 mm (9.4 inches)

Dimensions
Dry weight: 142.0 kg (313.1 pounds)
Power/weight ratio: 0.0782 HP/kg
Seat height: 770 mm (30.3 inches)
Overall height: 1,065 mm (41.9 inches)
Total length: 2,050 mm (80.7 inches)
Overall width: 2,050 mm (80.7 inches)
Ground clearance: 190 mm (7.5 inches)
Wheelbase: 1,360 mm (53.5 inches)
Fuel capacity: 13.50 liters (3.57 gallons)

3D View

Please click on the exhaust below to see the 3D model

Round

Oval

Tri-Oval

Tri-Oval GP Outlet 3D view

GP Outlet

Twin Outlet

Evo Outlet

Triple Outlet

Gallery

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Road Legal / Race

All our Road Legal exhausts come with a Road Legal Baffle / Decibel Killer + BSAU ( British Road-Legal ) markings.

All our RACE exhausts do not come with a Road Legal Baffle / Decibel Killer + do not have any BSAU ( British Road-Legal ) markings. and are marked NOT FOR ROAD USE

2024 Road legal exhaust statement:

At Max Torque Cans we prioritise safety and compliance in the world of motorcycle exhausts. Our commitment to adhering to regulations is evident in our product design and labelling, and hence with new updates from ACEM, DVSA and DfT, we are ensuring our exhaust systems are compliant with new and upcoming legislation and regulations. Specifically, two changes detailed below:

Road Legal Exhausts: Our road legal exhausts will have the BSAU stamped markings and be crafted with non-removable baffles, aligning seamlessly with the standards set by ACEM (European Association of Motorcycle Manufacturers). These baffles are an integral part of our design to ensure that your motorcycle exhaust complies with road regulations, providing you with a legal and enjoyable riding experience.

Race Exhausts and Silencers: For those seeking an exhilarating experience on the track, our race exhausts are engineered to deliver optimal performance. Clearly marked with type approval markings “Not for Road Use” etched into the side, these exhausts are specifically designed for racing applications. This distinction is in line with DVSA policy, ensuring that our race exhausts are suitable for track use, meeting the highest performance standards without compromising on safety.