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 is, without question, one of the smartest, most cost-effective bolt-on upgrades you can make to the Z900RS or Z900RS Café — shedding dead weight, unlocking genuine performance gains, and giving your machine a cleaner, leaner profile in the process. If you have been lugging that heavy, restrictive factory catalytic converter box around since the day you first rode your Z900RS out of the showroom, it is long past time to do something about it. This CNC mandrel-bent, T304 stainless steel de-cat link pipe is precision engineered to replace the standard cat box with minimal fuss and maximum reward, and once you have made the swap, you will wonder why you waited so long.

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

Put simply, this is a direct replacement link pipe designed to slot in exactly where your heavy, factory catalytic converter box used to live. The standard cat box on the Kawasaki Z900RS tips the scales at a hefty 4.33 kg. 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 swap. That is nearly four bags of sugar gone from your midframe in a single afternoon, with nothing lost except restriction.

Manufactured from T304 stainless steel using CNC mandrel bending techniques, this de-cat pipe maintains a consistent 2-inch bore diameter throughout every bend, ensuring smooth, unrestricted gas flow from front to rear. No crushing, no kinking, no compromise. The result is a freer-breathing performance exhaust that lets your engine do exactly what it was always meant to do — without factory-fitted emissions hardware throttling its true potential. Paired with a quality aftermarket silencer or even your standard Kawasaki can, the difference in throttle response and exhaust note is immediately and unmistakably noticeable from the very first ride.

Key Features 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 handle everything British roads and British weather can throw at it, mile after relentless mile.
• 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.
• 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.
• Retains OEM O2 Sensor Position — The front downpipe oxygen sensor remains in its original location, keeping your fuelling management fully intact and your ECU happy.
• 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.
• 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.
• Compatible With Standard or Aftermarket Silencers — Mates up cleanly with whatever can you are running at the rear, OEM or otherwise, with no adaptors required.
• Fits 2017 – 2021 Kawasaki Z900RS & Z900RS Café — Exact fitment for both variants, zero modifications needed on either model.

Fitment and Installation Notes

Installation is genuinely straightforward, even for riders with modest mechanical confidence. Once you have removed the standard cat box, 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, the kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets will mate up with it in exactly the same way the factory cat box did. Remove the old cat box, bolt this in, 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.

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.

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 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 kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets into place, and enjoy the results on your very next ride.

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, if you are also fitting an aftermarket air filter or a freer-flowing performance can at the same time, a remap is always recommended to get the very best out of your setup and extract every last bit of performance the engine has to offer.

Can I keep my standard rear silencer?

Absolutely. The kawasaki zr900rs & cafe 2017′ – 21′ stainless de-cat exhaust pipe c/w clamp & shield brackets is fully compatible with the standard Kawasaki rear can as well as any aftermarket silencer. It fits precisely as the factory cat box did — no adaptors, no compromise, no surprises.

How much weight will I actually save?

The standard factory cat box weighs 4.33 kg. This de-cat pipe weighs just 0.7 kg — a saving of 3.6 kg from a single bolt-on swap. For a naked roadster like the Z900RS, that is a meaningful and immediately noticeable reduction in midframe mass that makes itself felt every time you tip into a corner, accelerate hard out of a bend, or