Kawasaki ZR900RS & Cafe 2017′ – 21′ Stainless De-cat exhaust pipe C/W clamp & shield brackets

The kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets represents one of the most intelligent, cost-effective performance upgrades available for owners of the Kawasaki Z900RS and Z900RS Café, delivering instant weight reduction, improved throttle response, and a cleaner exhaust profile without breaking the bank or requiring specialist workshop tools.

If you have been riding around with the heavy, restrictive factory catalytic converter box weighing down your mid-section since the day you collected your Z900RS from the dealership, you are carrying unnecessary mass that is holding back both performance and handling. This precision-engineered, T304 stainless steel de-cat link pipe replaces the standard cat box with minimal fuss and maximum reward, transforming your bike’s character from the very first twist of the throttle.

What Makes the Kawasaki ZR900RS & Cafe 2017′ – 21′ Stainless De-Cat Exhaust Pipe C/W Clamp & Shield Brackets Different?

This is a direct replacement link pipe designed to slot in exactly where your bulky, factory-fitted catalytic converter box currently lives. The standard cat box on the Kawasaki Z900RS weighs a hefty 4.33 kg — a significant lump of mass sitting right in the heart of your bike’s chassis. By contrast, the kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets weighs just 0.7 kg, delivering an instant weight saving of 3.6 kg from a single, straightforward bolt-on swap.

That is nearly four bags of sugar removed from your midframe in a single afternoon, with nothing lost except restriction and bulk.

Manufactured from premium T304 stainless steel using CNC mandrel bending techniques, this de-cat pipe maintains a consistent 2-inch bore diameter throughout every bend and curve. This matters enormously because it ensures smooth, unrestricted exhaust gas flow from front to rear, with no crushing, no kinking, and no internal diameter compromises that could choke performance.

The result is a freer-breathing exhaust system that allows your parallel-twin engine to breathe exactly as it was always meant to — without factory-fitted emissions hardware throttling its true potential. Whether you pair this de-cat pipe with a quality aftermarket silencer or even retain your standard Kawasaki rear can, the difference in throttle response, mid-range punch, and exhaust note is immediately and unmistakably noticeable from your very first ride.

Key Features and Benefits of the Kawasaki ZR900RS & Cafe 2017′ – 21′ Stainless De-Cat Exhaust Pipe C/W Clamp & Shield Brackets

• T304 Stainless Steel Construction: Corrosion-resistant, robust, and built to withstand everything British roads and British weather can throw at it, mile after relentless mile, season after season.
• CNC Mandrel Bent 2″ Link Pipe: Precision-formed bends maintain full internal diameter throughout for maximum, uninterrupted gas flow at every point in the pipe, eliminating restrictive turbulence.
• No Welding Required: Supplied complete with a new clamp for a clean, secure, weld-free installation that any rider with modest mechanical ability can tackle confidently at home.
• Retains OEM O2 Sensor Position: The front downpipe oxygen sensor remains in its original location, keeping your fuelling management fully intact and your ECU receiving accurate data without error codes or warning lights.
• Includes Heat Shield Brackets: All necessary shield brackets are supplied in the box, so nothing is left to chance and nothing extra needs sourcing separately from third-party suppliers.
• Saves 3.6 kg: A dramatic and immediately felt weight reduction over the standard factory cat box, noticed every single time you tip the bike into a corner or accelerate hard out of a bend.
• Compatible With Standard or Aftermarket Silencers: Mates up cleanly with whatever rear can you are running, OEM or otherwise, with no adaptors or modifications required.
• Fits 2017 – 2021 Kawasaki Z900RS & Z900RS Café: Exact fitment for both variants across all model years, zero modifications needed on either machine.

Fitment and Installation Notes for the Kawasaki ZR900RS & Cafe 2017′ – 21′ Stainless De-Cat Exhaust Pipe C/W Clamp & Shield Brackets

Installation is genuinely straightforward, even for riders with modest mechanical confidence and a basic toolkit. Once you have removed the standard cat box — which typically requires nothing more than loosening a couple of clamps and unbolting the heat shield brackets — the kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets simply bolts into place using the supplied clamp and bracket hardware.

There is no need to weld anything, no need to cut existing pipework, and no need to source additional fittings separately. Everything required for a clean, secure installation is already in the box when it arrives at your door.

The pipe has been designed to work seamlessly with your existing front downpipes, and critically, it retains the OEM O2 sensor in its original position. This matters because it means your bike’s ECU continues to receive fuelling data as normal — no error codes, no warning lights, and no need for an immediate remap just to get the bike running properly straight out of the gate.

Whether your rear can is standard Kawasaki or a performance aftermarket silencer, this de-cat pipe will mate up with it in exactly the same way the factory cat box did. Remove the old cat box, bolt this in, tighten everything down to the correct torque settings, and ride — job done.

Important note on fuelling: Whilst this de-cat pipe will not cause your bike to run poorly on a standard map, if you are also running an aftermarket air filter alongside this upgrade, we strongly recommend having your fuelling reviewed by a qualified tuner. Optimising fuelling to suit your new performance exhaust setup will always deliver the best results for power, efficiency, and everyday rideability.

For riders looking to upgrade other machines in their garage, we also stock performance exhaust solutions such as the Aprilia RS660 De-Cat DownPipes and the Triumph 765 Moto 2 De-Cat pipe, both offering similar weight savings and performance gains for their respective models.

Is the Kawasaki ZR900RS & Cafe 2017′ – 21′ Stainless De-Cat Exhaust Pipe C/W Clamp & Shield Brackets Road Legal?

This is the question we get asked most often, and the answer is more straightforward than most riders expect. In the UK, motorcycles are tested for noise at MOT — not for emissions. This means that if you are already running a road-legal can at the rear of your Z900RS — one with a BSAU-marked, removable baffle fitted and in place — then removing the cat box and fitting the kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets will not cause your bike to fail its MOT.

According to the UK Government’s official MOT guidance, the exhaust system is assessed primarily on noise levels and physical condition, not on the presence or absence of a catalytic converter.

All Max Torque Cans road-legal exhausts are supplied with a removable road legal baffle and carry full BSAU markings. Once that removable baffle is unbolted, the can becomes a race exhaust and is no longer road legal. Our race cans do not carry BSAU markings and are intended for closed-road or track use only.

The kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets is a performance component and should always be used in conjunction with an appropriate, legally compliant rear silencer when riding on public roads.

What You Will Receive

• 1 x Kawasaki Z900RS & Z900RS Café De-Cat Link Pipe (2017 – 2021)
• T304 Stainless Steel construction throughout
• CNC Mandrel Bent 2″ bore pipe for unrestricted exhaust gas flow
• 1 x New Clamp for secure, weld-free fitment
• Heat Shield Brackets included — everything you need is already in the box

No welding. No additional parts needed. No head-scratching. Just remove the old cat box, bolt the de-cat pipe into place, and enjoy the results on your very next ride. The transformation in how your Z900RS responds and sounds will leave you wondering why you waited so long to make the swap.

Frequently Asked Questions

Will this de-cat pipe fit both the Z900RS and the Z900RS Café?
Yes. The kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets is designed to fit both the standard Z900RS and the Café variant across all model years 2017 through to 2021. No modifications are required for either version.

Do I need to remap my bike after fitting this?
Not necessarily. Your O2 sensor remains in its original position on the front downpipes, so the ECU continues to manage fuelling as standard. However,