Kawasaki H2 SE & H2 SX Stainless De-cat exhaust pipe CNC Mandrel bent C/W clamp

When it comes to upgrading kawasaki performance superbike exhausts, few modifications deliver the instant transformation that a precision-engineered de-cat pipe provides. The Kawasaki H2 SE & H2 SX Stainless De-cat exhaust pipe from Carbon Can Co Ltd represents the pinnacle of aftermarket exhaust engineering, combining CNC mandrel bent construction with T304 stainless steel to unlock the true potential of your machine whilst dramatically reducing weight and eliminating the restrictive factory catalytic converter.

Premium Engineering for Kawasaki Performance Superbike Exhausts

This replacement de-cat pipe has been specifically designed for the Kawasaki H2 SE and H2 SX models, offering a direct replacement for the standard catalytic converter box that restricts exhaust flow and adds unnecessary weight to your superbike. Manufactured from premium T304 stainless steel, this component is built to withstand the extreme temperatures and pressures generated by the supercharged powerplant of the H2 range. The CNC mandrel bent construction ensures perfectly smooth internal bore throughout the 60mm diameter pipe, eliminating the turbulence and restrictions commonly found in crush-bent alternatives.

What sets this de-cat pipe apart is the precision fitment and ease of installation. Unlike inferior products that require permanent modification or professional welding, this system is designed as a bolt-on replacement. Simply remove your standard catalytic converter box and install this lightweight de-cat pipe in its place using the supplied stainless steel clamp. The design intelligently retains the oxygen sensor mounting in the front down-pipes, ensuring compatibility with your bike’s fuel injection system and preventing any warning lights or mapping issues.

Significant Weight Savings with Kawasaki Performance Superbike Exhausts

Performance enthusiasts understand that every kilogram removed from a motorcycle improves acceleration, handling, and overall dynamics. The factory catalytic converter box on the H2 SE and SX models weighs a substantial 3.9 kilograms, positioned relatively high and centrally on the machine where weight has maximum negative impact on agility. This aftermarket de-cat pipe weighs just 1.2 kilograms, delivering an impressive 2.7 kilogram weight saving. This reduction in unsprung and centrally-mounted mass noticeably improves the bike’s responsiveness to steering inputs and reduces the effort required to change direction.

Beyond the weight advantage, removing the catalytic converter eliminates a significant restriction in the exhaust system. The factory cat box contains a honeycomb substrate that impedes exhaust gas flow, creating back-pressure that limits engine breathing, particularly at higher RPM. With this obstruction removed, exhaust gases flow more freely, allowing the engine to breathe more efficiently throughout the rev range. Riders typically report improved throttle response, stronger mid-range pull, and more aggressive exhaust note after installing a quality de-cat pipe.

Understanding Kawasaki Performance Superbike Exhausts and MOT Compliance

One of the most common concerns when considering exhaust modifications relates to MOT compliance and legality. In the UK, motorcycles are subject to noise testing rather than emissions testing during the MOT inspection. This means that provided your exhaust system meets the noise regulations and you retain a road-legal silencer, removing the catalytic converter will not result in an MOT failure. This de-cat pipe is specifically designed to work with both standard and aftermarket rear silencers, maintaining the same fitment and connection points as the original catalytic converter box.

It’s worth noting that whilst MOT testing for motorcycles doesn’t include emissions analysis, riders should be aware of their responsibilities regarding road legality and environmental considerations. For track-day enthusiasts and those building dedicated racing machines, catalytic converter removal is standard practice. For road riders, the decision should be made with full understanding of both the performance benefits and any implications. According to guidance from the UK Government’s official MOT information, motorcycle testing requirements differ significantly from car testing protocols.

What You Receive with Your De-Cat System

When you order this precision-engineered component for your kawasaki performance superbike exhausts system, you receive a complete installation package. The kit includes the CNC mandrel bent T304 stainless steel de-cat pipe with 60mm diameter bore, professionally finished to the highest standards. A high-quality stainless steel clamp is supplied for secure installation, ensuring a leak-free seal that will withstand the thermal cycling and vibration that exhaust components endure. The pipe is designed to fit precisely where you have removed the standard catalytic converter box, maintaining all original mounting points and ensuring compatibility with your existing exhaust configuration.

The 60mm internal diameter has been carefully selected to optimise flow characteristics for the H2’s supercharged engine. This sizing maintains optimal exhaust gas velocity whilst reducing restriction, delivering measurable performance gains without sacrificing the low-end torque that makes the H2 range so thrilling to ride. The smooth mandrel bends eliminate the internal ridges and deformations that occur with crush bending, ensuring consistent diameter throughout the pipe’s length for maximum flow efficiency.

Installation and Compatibility

Installation of this de-cat pipe is straightforward for anyone with basic mechanical skills and appropriate tools. The process involves removing the original catalytic converter box, positioning the new de-cat pipe in its place, and securing it with the supplied clamp. No cutting, welding, or permanent modifications are required, making this an ideal upgrade for riders who may wish to return their bike to standard specification in the future. The oxygen sensor remains in its original position in the front down-pipes, ensuring the fuel injection system continues to receive accurate feedback for optimal engine management.

This de-cat pipe is compatible with both standard Kawasaki rear silencers and aftermarket options. Whether you’re running the factory exhaust or have already upgraded to an aftermarket system, this de-cat pipe will integrate seamlessly. For riders looking to build a complete custom exhaust system, Carbon Can Co Ltd offers complementary components including our Stainless exhaust pipe & clamp for Kawasaki H2 SE & SX with ZX10R Headers, allowing for comprehensive exhaust system customisation.

Frequently Asked Questions

Will this de-cat pipe fit my aftermarket exhaust? Yes, this pipe maintains the same connection points as the original catalytic converter, so it will work with both standard and aftermarket rear silencers without any modifications.

Do I need to remap my ECU after installing this de-cat pipe? Whilst the bike will run safely with the standard map, a professional remap or fuel controller will optimise performance and take full advantage of the improved exhaust flow characteristics.

Is welding required for installation? No welding is necessary. The system uses a high-quality clamp connection, making installation and future removal straightforward.

Will this affect my warranty? Aftermarket modifications may affect manufacturer warranty coverage. We recommend checking your warranty terms or consulting with your dealer before making modifications to a bike still under warranty.

Carbon Can Co Ltd has established a reputation for engineering excellence in the motorcycle exhaust industry, and this Kawasaki H2 SE & SX de-cat pipe exemplifies our commitment to quality, performance, and practical design. Whether you’re preparing your H2 for track days, seeking to optimise street performance, or simply wanting to shed unnecessary weight and liberate that supercharged exhaust note, this precision-manufactured component delivers measurable improvements you’ll feel with every twist of the throttle.