Kawasaki ZR900 Performance model T304 Stainless De-cat exhaust pipe,NOT RS MODEL

The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe represents one of the most effective and immediate bolt-on upgrades available for riders of the Kawasaki Z900 Performance model who demand better performance, reduced weight, and cleaner aesthetics from their machine. Engineered and supplied by Max Torque Cans, this precision-crafted de-cat pipe has been designed specifically to replace the restrictive, overweight factory catalytic converter box that holds your Z900 back.

Built from premium T304 stainless steel and shaped using advanced CNC mandrel bending technology, this is a product that delivers real-world gains the moment you twist the throttle.

Please note: this listing is for the Kawasaki Z900 Performance model only — it is NOT compatible with the RS model. Before purchasing, always verify your exact bike variant to ensure perfect fitment and avoid any installation issues.

Why the Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe Transforms Your Ride

The standard catalytic converter box fitted to the Kawasaki Z900 Performance model is a necessary compromise from the factory — but it’s a compromise that costs you in multiple ways. Weighing in at a hefty 4.33 kg, it adds significant mass to the underside of your bike, disrupting weight distribution and contributing to a bulkier, less purposeful look. More importantly, it severely restricts exhaust gas flow, limiting the bike’s natural performance potential and dulling throttle response.

Our kawasaki zr900 performance model t304 stainless de-cat exhaust pipe eliminates this bottleneck entirely. Replacing the cumbersome cat box with a sleek, free-flowing 2-inch CNC mandrel bent link pipe that weighs just 0.7 kg, this upgrade delivers an immediate weight saving of 3.6 kg. That’s over three and a half kilograms of dead weight stripped away from your bike — a reduction you’ll feel every time you flick the Z900 into a corner or roll on the power out of a bend.

Weight reduction is only part of the story. The smooth, consistent internal bore of the mandrel bent pipe ensures exhaust gases can exit the engine with minimal turbulence or restriction. This improved flow translates into sharper throttle response, a more aggressive exhaust note, and a noticeable uplift in mid-range power delivery.

The T304 stainless steel construction ensures this performance advantage won’t fade over time — T304 is renowned for its excellent resistance to heat, corrosion, and the punishing conditions of British roads and weather. According to BikeWorld UK, stainless steel exhaust components offer superior longevity compared to mild steel alternatives, making them the preferred choice for serious riders.

Straightforward Fitment: Installing the Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe

One of the standout features of the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe is how effortlessly it integrates into your existing exhaust system. There’s no welding required, no complex fabrication, and no need to visit a specialist workshop. The de-cat pipe is designed to fit directly in place of your standard catalytic converter box, using the original mounting points and connection interfaces.

Supplied complete with a new clamp, installation is genuinely a DIY-friendly job that most riders can complete at home with basic hand tools in under an hour. Simply unbolt the factory cat box, slide the new de-cat pipe into position, tighten the clamp, and you’re done. Your existing rear silencer — whether that’s the standard Kawasaki unit or an aftermarket can from Max Torque Cans or another manufacturer — will continue to fit exactly as before, making this a true plug-and-play performance upgrade.

Crucially, the design retains the original oxygen (O2) sensor in the front downpipes. This sensor feeds critical data to your bike’s ECU, helping it manage fuelling and maintain smooth running. By keeping the O2 sensor in place, the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe ensures your bike continues to run cleanly without triggering warning lights or causing erratic fuelling behaviour. It’s an intelligent, rider-focused solution that respects your bike’s electronics rather than creating unnecessary complications.

Key Features and Specifications of the Kawasaki ZR900 Performance Model T304 Stainless De-Cat Exhaust Pipe

• CNC mandrel bent 2-inch link pipe — ensures smooth, unrestricted exhaust gas flow for maximum performance gains
• T304 stainless steel construction — exceptional corrosion resistance and heat tolerance for long-lasting durability
• No welding required — supplied with a new clamp for straightforward, bolt-on installation
• O2 sensor retained — maintains fuelling stability and keeps your ECU operating correctly
• Massive weight saving of 3.6 kg — reduces overall bike weight from 4.33 kg down to just 0.7 kg
• Compatible with all rear silencers — works perfectly with standard or aftermarket cans
• Performance model fitment only — NOT suitable for the RS variant

MOT Considerations and Road Legality

A common concern among UK riders considering de-cat pipes is MOT compliance. The good news is straightforward: in the United Kingdom, motorcycles are tested for noise levels during MOT inspections, not emissions. Provided your rear silencer is road-legal and within acceptable noise limits, fitting the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe should not result in an MOT failure. If you’re running a road-legal aftermarket silencer, you can remove the cat box with confidence.

That said, we always encourage responsible riding and adherence to local regulations. For track days or closed-road competition use, removing the catalytic converter is an obvious and entirely legitimate performance step. Even for everyday road riding, this upgrade offers a practical, legal, and highly effective way to unlock your Kawasaki Z900’s full potential without compromising your ability to pass annual testing.

It’s also worth noting that our exhaust components are engineered to deliver noticeable performance improvements without requiring an immediate fuel remap. However, if you’ve also installed an aftermarket air filter or made other breathing modifications, having your fuelling professionally optimised by a qualified tuner will help you extract every last bit of power and ensure your engine runs at its absolute best.

Frequently Asked Questions

Will the kawasaki zr900 performance model t304 stainless de-cat exhaust pipe fit my Z900 RS?
No. This product is designed exclusively for the Kawasaki Z900 Performance model and will not fit the RS variant. Please confirm your exact model before ordering.

Do I need to remap my bike after fitting the de-cat pipe?
Not necessarily. The de-cat pipe is designed to work effectively without an immediate remap. However, if you’ve also fitted an aftermarket air filter or other performance modifications, a professional fuel tune will maximise your gains.

Will my O2 sensor still function correctly?
Yes. The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe retains the front downpipe O2 sensor in its original position, ensuring stable fuelling and proper ECU operation.

Can I use my existing aftermarket silencer?
Absolutely. Whether you’re running the standard Kawasaki silencer or an aftermarket performance can, both will connect and fit exactly as they did before — the de-cat pipe simply replaces the restrictive cat box.

How difficult is installation?
Very straightforward. No welding is required, and the pipe comes supplied with a new clamp. Most riders complete the installation at home in under an hour using standard workshop tools.

If you’re exploring performance upgrades for other bikes, you might also be interested in our Triumph 765 Moto 2 De-Cat pipe or our Aprilia RS660 De-Cat DownPipes — both precision-engineered, bolt-on upgrades from the Max Torque Cans range.

The kawasaki zr900 performance model t304 stainless de-cat exhaust pipe is a no-nonsense, high-quality upgrade that delivers immediate, tangible benefits — less weight, better flow, sharper handling, and a more engaging riding experience. Order yours today from Max Torque Cans and feel the difference from your very first ride.