Kawasaki Ninja 1000 sx, 2019 – 2024 model – Stainless De-cat exhaust pipe & clamp

If you own a kawasaki ninja 1000 sx and you’re frustrated by the weight, bulk, and performance restrictions of the standard catalytic converter box, this stainless de-cat pipe is exactly what you’ve been looking for. Manufactured from premium T304 stainless steel and CNC mandrel bent for a precise, reliable fit, this de-cat link pipe is designed specifically for the Kawasaki Ninja 1000 SX covering the 2019 through to 2024 model years.

It’s one of the most effective and straightforward upgrades you can make to your bike without touching the engine itself, delivering measurable improvements in weight reduction, exhaust flow, and overall riding dynamics.

Why Upgrade Your Kawasaki Ninja 1000 SX With a De-Cat Pipe?

The standard catalytic converter fitted to the kawasaki ninja 1000 sx is a significant piece of kit — and not in a good way. It tips the scales at a whopping 5 kilograms. Our aftermarket de-cat pipe weighs in at just 0.7 kilograms, which means you’re shedding an impressive 4.3 kilograms of unnecessary mass from the mid-section of your motorcycle. That’s dead weight you’ve been carrying around on every single ride, affecting handling, agility, and responsiveness.

Beyond the substantial weight saving, the standard cat box is bulky, visually unappealing, and restrictive by design. Removing it opens up the exhaust flow considerably, allowing the engine to breathe more freely and respond with greater enthusiasm throughout the rev range. Whether you’re riding with a standard silencer or have already fitted an aftermarket can, this de-cat pipe slots seamlessly into the equation — your rear silencer will fit exactly as it did before, just without the cumbersome cat box holding everything back.

The improved exhaust gas flow translates to sharper throttle response, a more engaging riding experience, and a noticeable reduction in heat buildup around the mid-section of the bike.

T304 Stainless Steel Construction — Built to Last

This de-cat pipe is fabricated from T304 stainless steel, chosen specifically for its resistance to heat, corrosion, and the harsh conditions that come with year-round British riding. T304 is the material of choice for quality performance exhaust components — it won’t rust, it holds its finish over time, and it’s robust enough to last the lifetime of your motorcycle with minimal maintenance.

According to Motorcycle News, choosing the right materials for exhaust modifications is crucial for longevity and performance, making T304 stainless the gold standard for serious enthusiasts.

The CNC mandrel bending process ensures that every curve in the pipe maintains a consistent internal diameter throughout. There are no pinch points, no kinks, and no restrictions — just smooth, unrestricted gas flow from the headers rearward. The result is a component that not only performs brilliantly but looks the part too.

No more hiding behind a large, ugly cat box when you’re parked up at a meet or rolling through town. The polished stainless finish is a visual upgrade in its own right, complementing the aggressive styling of the Ninja 1000 SX perfectly.

Fitment Guide for the Kawasaki Ninja 1000 SX 2019–2024

This de-cat pipe is designed to fit the kawasaki ninja 1000 sx models produced between 2019 and 2024. It connects to your standard OEM headers and eliminates the factory cat box entirely. The pipe comes complete with a new clamp for secure refixing, and no welding is required — this is a bolt-on (and cut-and-clamp) installation that keeps the job accessible for home mechanics and workshop professionals alike.

It is worth noting that your standard OEM headers will need to be cut at the required position before the de-cat pipe is fitted. Full photographic guidance and detailed instructions are provided with your order to make this as straightforward as possible. We also have a dedicated YouTube video walkthrough available to guide you through the process step by step, ensuring you have all the visual reference points you need to complete the job with confidence.

• Fits: Kawasaki Ninja 1000 SX, 2019 to 2024 model years
• Material: T304 Stainless Steel
• Manufacturing method: CNC Mandrel Bent
• Weight: 0.7 kg (saving 4.3 kg over the standard cat box)
• Welding required: No
• Clamp included: Yes
• Compatible with: Standard or aftermarket rear silencers

Is Removing the Cat Box on the Kawasaki Ninja 1000 SX MOT Legal?

This is one of the most common questions we receive, and the answer is reassuring. In the UK, motorcycles are tested for noise levels during an MOT — not emissions. This means that as long as your rear silencer is road-legal and within the permitted noise threshold, removing the cat box from your kawasaki ninja 1000 sx will not cause you to fail your MOT.

Riders who have already fitted a road-legal aftermarket can will find this particularly liberating — you get the weight savings, the improved flow, and the improved aesthetics without any legal compromise.

Please be aware that while the pipe is MOT passable in conjunction with a road-legal silencer, removing the catalytic converter does affect emissions output. This upgrade is intended for road use with appropriate silencers and should not be used to circumvent noise regulations. Always ensure your silencer complies with current UK regulations to maintain full road legality.

Installation Notes for Your Kawasaki Ninja 1000 SX De-Cat Pipe

Fitting this de-cat pipe is considered a workshop-level job, but a competent, mechanically minded rider with the right tools should be perfectly capable of carrying out the installation at home. The process involves cutting the OEM headers at the correct position — a task that requires care and precision. Comprehensive photographic guidance is provided with every order, and our step-by-step YouTube video is an invaluable resource if you want to follow along visually before picking up a tool.

If you’re not confident tackling the job yourself, we recommend taking the bike and the pipe to a trusted motorcycle workshop. The installation is straightforward for any competent mechanic familiar with the kawasaki ninja 1000 sx platform, and most workshops should be able to turn this around in a single session. The lack of welding requirement significantly reduces complexity and cost compared to traditional fabricated solutions.

• No welding required — clamp-fit installation
• OEM headers must be cut at the specified location
• Photographic instructions included with every order
• YouTube video guide available
• Suitable for standard or aftermarket rear silencers
• Recommended as a workshop job or for competent home mechanics

Frequently Asked Questions — Kawasaki Ninja 1000 SX De-Cat Pipe

Will this fit both the standard silencer and an aftermarket can?
Yes. The de-cat pipe is designed so that your rear silencer — whether standard OEM or aftermarket — connects in exactly the same way as before. The only thing being removed from the equation is the cat box itself.

Do I need to remap my kawasaki ninja 1000 sx after fitting?
A remap is not strictly required, although many riders choose to have one done to fully optimise the fuelling once the restriction of the cat box has been removed. The bike will run without a remap, but a tune will help you get the maximum benefit from the improved exhaust flow.

How much weight will I actually save?
The standard cat box weighs 5 kg. This de-cat pipe weighs 0.7 kg. You will save 4.3 kg — a significant reduction that is immediately noticeable in handling and agility.

Will this pass an MOT?
Yes, provided you are running a road-legal silencer. UK motorcycle MOT testing is based on noise, not emissions, so this combination is MOT passable.

If you’re exploring de-cat options across different bikes, you might also be interested in our Triumph 765 Moto 2 De-Cat pipe — another precision-engineered stainless solution for riders who demand the best from their exhaust setup. For those browsing the full range of performance downpipe upgrades, take a look at our Aprilia RS660 De-Cat DownPipes as well.

The kawasaki ninja 1000 sx is a capable, exciting motorcycle that deserves to perform without unnecessary restrictions holding it back. This de-cat pipe is a simple, high-quality upgrade that delivers real, measurable results — less weight, better flow, and a far cleaner mid-section. Order yours today and feel the difference from your very first ride.