Kawasaki H2 SE & SX with ZX10R Headers, Stainless De-cat exhaust pipe & clamp

If you’re running a kawasaki h2 se & sx with zx10r headers setup, this precision-engineered stainless de-cat pipe is the performance upgrade your supercharged machine has been waiting for. Designed specifically to bridge the gap between ZX10R titanium headers and the H2 SE or SX rear silencer, this CNC mandrel-bent link pipe eliminates the heavy, restrictive factory cat box and transforms your ride from the very first twist of the throttle. Whether you’re chasing cleaner throttle response, a serious weight reduction, or a more aggressive exhaust note on road and track, this de-cat pipe delivers on every single count.

Why the Kawasaki H2 SE & SX With ZX10R Headers De-Cat Pipe Is a Must-Have Upgrade

The standard Kawasaki H2 SE and SX cat box is a chunky, cumbersome unit that tips the scales at a whopping 3.9 kg. It’s bulky, it’s restrictive, and frankly it does your supercharged monster no favours in terms of performance, weight distribution, or aesthetics. This aftermarket de-cat pipe weighs in at just 1.0 kg — a saving of 2.9 kg of dead weight, removed in a single straightforward swap. On a bike that already pushes the boundaries of road-legal performance, shedding that kind of mass from the heart of the exhaust path is anything but insignificant.

Manufactured from T304 stainless steel throughout, this link pipe is built to last the long haul. T304 is renowned for its superior corrosion resistance and its ability to withstand the punishing heat cycles generated by forced induction engines. It won’t rust, it won’t warp, and it won’t let you down after a season of hard riding in the British weather. The 60mm diameter bore is perfectly matched to the flow requirements of the kawasaki h2 se & sx with zx10r headers combination, ensuring exhaust gases exit freely and efficiently without a hint of restriction. The result is an immediately noticeable improvement in throttle response and a more purposeful, characterful exhaust note that suits the supercharged nature of the H2 platform perfectly.

Key Features of the Kawasaki H2 SE & SX With ZX10R Headers De-Cat Pipe

• Material: T304 stainless steel throughout — corrosion-resistant and heat-tolerant for long-term reliability
• Diameter: CNC mandrel-bent 60mm Ø bore for optimum gas flow and a precise, rattle-free fit
• Weight: Just 1.0 kg — saving an impressive 2.9 kg over the factory cat box
• Supplied complete with a stainless clamp — no additional hardware required for a clean installation
• No welding required — a genuine bolt-on fitment that any competent home mechanic can handle
• Compatible with standard and aftermarket rear silencers — your existing can fits exactly as before
• Specifically engineered for the kawasaki h2 se & sx with zx10r headers combination — not a generic off-the-shelf part

Every detail of this de-cat pipe has been considered with the kawasaki h2 se & sx with zx10r headers fitment firmly in mind. From the mandrel-bent profile that maintains consistent bore diameter through every curve, to the high-quality stainless clamp included in the box, this is a product that reflects genuine engineering care rather than a rushed budget fabrication.

Fitment Guide for the Kawasaki H2 SE & SX With ZX10R Headers

This de-cat pipe is engineered for one very specific and increasingly popular conversion: fitting ZX10R titanium headers onto the Kawasaki H2 SE or H2 SX in place of the standard H2 stainless headers and downpipes. It’s a build path that has grown enormously in popularity among H2 owners who want the considerable weight and performance benefits of ZX10R titanium headers without the expense or complexity of a fully custom fabrication job.

The link pipe connects your ZX10R headers directly to your rear silencer — whether that’s the standard Kawasaki unit or a quality aftermarket performance can — without any need for welding or fabrication. It clamps cleanly into place using the supplied stainless clamp, resulting in a tidy, professional-looking installation that looks as good as it performs. Once in place, the de-cat pipe sits neatly within the same envelope previously occupied by the factory cat box, with no fouling on the frame, bodywork, or swingarm.

Important Installation Note for the Kawasaki H2 SE & SX With ZX10R Headers Conversion

When fitting ZX10R headers to the Kawasaki H2 SE or H2 SX, 5mm titanium spacers are required at the head flanges. This is a critical fitment detail that must not be overlooked. Without these spacers, the headers will not seat correctly against the engine, which can result in exhaust leaks and potential long-term damage. If you’re unsure about sourcing the correct spacers, please get in touch with us before you begin installation — we’re always happy to point you in the right direction.

Once the kawasaki h2 se & sx with zx10r headers setup is correctly assembled and this de-cat pipe is in place, your rear silencer — stock or aftermarket — connects in exactly the same fashion as it always did. There are no modifications required on the silencer side of the equation whatsoever. It’s a clean, purposeful upgrade that makes an immediately noticeable difference to the character and outright performance of your H2.

Is the Kawasaki H2 SE & SX With ZX10R Headers De-Cat Pipe MOT Legal?

This is one of the most common questions we receive, and the answer will please the vast majority of UK riders. In the United Kingdom, motorcycles are noise tested at MOT — not emissions tested. This means that removing the cat box does not automatically result in an MOT failure. Provided your overall exhaust noise levels remain within acceptable limits — which they will do if you’re running a road-legal rear silencer or performance can — this de-cat pipe will not affect your bike’s ability to pass its annual test.

That said, we always recommend checking the current MOT standards applicable to your specific bike’s year of registration, as regulations can and do evolve over time. As a general rule, if your rear can carries a road-legal marking and operates within the permitted dB limits, you’re in good shape. The removal of the cat box on the kawasaki h2 se & sx with zx10r headers setup simply allows the engine to breathe more freely — without landing you in hot water at the test station.

What’s in the Box

• 1 x CNC mandrel-bent 60mm T304 stainless de-cat link pipe
• 1 x Stainless clamp for secure, rattle-free fitment

Everything you need to complete the installation is included in the box. There are no hidden extras and no need to source additional components — with the exception of the 5mm titanium head flange spacers noted above, which are a requirement of the wider kawasaki h2 se & sx with zx10r headers conversion rather than this pipe specifically.

Frequently Asked Questions

Will this de-cat pipe work with my standard rear silencer?

Yes, absolutely. This link pipe is designed so that your standard Kawasaki silencer connects in exactly the same way as before. The same holds true for the vast majority of popular aftermarket performance cans. The de-cat pipe replaces the cat box — everything downstream remains completely unchanged.

Do I need to remap my bike after fitting this pipe?

While the de-cat pipe delivers improvements in exhaust flow straight out of the box, many riders choose to pair the modification with a remap or Power Commander tune to fully exploit the gains on offer. It isn’t a strict requirement, but it is strongly recommended if you want to extract every last ounce of performance from your supercharged H2 with the kawasaki h2 se & sx with zx10r headers combination in place.

What are the 5mm titanium spacers for, and where do I get them?

When mounting ZX10R headers onto the H2 SE or H2 SX engine, there is a dimensional difference at the head flanges that requires 5mm titanium spacers to achieve a proper, leak-free seal. This is a non-negotiable element of the fitment process. Always install these spacers before torquing down the header flanges. Contact us directly if you need guidance on sourcing the correct items.

How difficult is the installation?

For anyone with reasonable mechanical aptitude and a basic toolkit, this is a very manageable job. There’s no welding, no cutting, and no specialist equipment required beyond a standard socket set and a torque wrench. If you’ve ever removed a set of headers before, you’ll feel entirely at home. If you’re less confident, we’d always recommend enlisting a trusted local motorcycle mechanic to complete the work.

If you’re looking to free up performance on other machines in the garage, take a look at our Triumph 765 Moto 2 De-Cat pipe — a hugely popular upgrade for Triumph Street Triple owners chasing the same weight savings and flow benefits. For Aprilia owners, our Aprilia RS660 De-Cat DownPipes