Kawasaki ZR900 Performance 17 – 2021′ Exhaust Pipe & Black Alloy Shield Cover

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This premium exhaust pipe cover and performance de-cat pipe combination for the Kawasaki ZR900 (2017-2021 models) delivers exceptional weight savings, improved exhaust flow, and a sleek black alloy heat shield that transforms both the performance and appearance of your motorcycle. Engineered by Quill Performance Exhausts, this complete kit replaces the restrictive factory catalytic converter box with a precision CNC mandrel-bent 2-inch link pipe, whilst the included black alloy shield cover provides essential heat protection and a sophisticated racing aesthetic.

About the Kawasaki ZR900 Performance Exhaust Pipe Cover System

The Kawasaki ZR900, known for its nimble handling and spirited performance, benefits enormously from exhaust system upgrades. This complete de-cat pipe and exhaust pipe cover package has been specifically designed for 2017 through 2021 model years, ensuring perfect fitment and optimal performance gains. When you order this product, you receive a complete CNC mandrel-bent stainless steel de-cat pipe with all necessary brackets and clamps, plus a stylish black alloy heat shield cover offered at 50% discount when purchased together with the pipe.

The installation process requires cutting your standard exhaust headers at specific measurements, clearly illustrated in the product images provided. This modification allows for the complete removal of the heavy, restrictive catalytic converter box that weighs a substantial 4.33 kilograms. The replacement aftermarket de-cat pipe weighs merely 0.7 kilograms, delivering an impressive weight saving of 3.6 kilograms from this single component upgrade alone.

Key Features of the Exhaust Pipe Cover and De-Cat System

This listing centres on a precision-engineered CNC mandrel-bent 2-inch link pipe designed to fit exactly where you’ve removed your standard catalytic converter box. The mandrel bending process ensures consistent internal diameter throughout all bends, maintaining optimal exhaust gas flow without the restrictions created by crush-bent alternatives. This manufacturing technique is crucial for maximising performance gains and ensuring smooth turbulence-free exhaust flow.

One of the standout advantages of this system is that it requires no welding whatsoever. The kit includes a high-quality stainless steel clamp that securely fixes the new pipe in position, maintaining all original exhaust O2 sensor positions in the front down-pipes. This preserves your motorcycle’s fueling management system integrity whilst eliminating the restrictive catalytic converter.

Your rear silencer remains completely compatible whether you retain the standard unit or have already upgraded to an aftermarket exhaust. The new de-cat pipe fits exactly as the original equipment did, ensuring seamless integration with your existing exhaust configuration. The accompanying black alloy heat shield cover not only protects surrounding components and your leg from excessive heat but also delivers a premium racing appearance that complements any Kawasaki ZR900 aesthetic.

Performance Benefits and Weight Reduction with This Exhaust Pipe Cover Kit

Removing the restrictive catalytic converter box delivers noticeable performance improvements across the rev range. The standard cat box creates significant back-pressure that limits exhaust gas evacuation, particularly at higher RPMs where maximum power is generated. By installing this free-flowing de-cat pipe, you allow exhaust gases to exit more efficiently, reducing pumping losses and freeing up horsepower that was previously trapped by the restrictive factory component.

The 3.6-kilogram weight saving contributes meaningfully to the motorcycle’s overall power-to-weight ratio and handling characteristics. Removing mass from the lower centre of the motorcycle improves agility and responsiveness, making the ZR900 feel even more nimble through corners and more eager to change direction. For track day enthusiasts and performance-focused riders, every kilogram saved translates to improved lap times and enhanced riding enjoyment.

According to Motorcycle News, aftermarket exhaust modifications rank among the most effective performance upgrades available for modern motorcycles, often delivering measurable power gains alongside weight reduction and improved exhaust note.

Why Choose This Kawasaki ZR900 Exhaust Pipe Cover and De-Cat System?

Quill Performance Exhausts manufactures this system to exacting standards, ensuring perfect fitment and long-term durability. The stainless steel construction resists corrosion and maintains its appearance even under the demanding conditions of high-temperature exhaust operation. The precision CNC mandrel bending process guarantees consistent quality across every unit produced, with tolerances that ensure trouble-free installation and optimal performance.

For riders with road-legal aftermarket exhausts already fitted, an important consideration is MOT compliance. In the UK, motorcycles undergo noise testing rather than emissions testing during MOT inspections. This means that removing the catalytic converter whilst retaining a road-legal silencer typically allows your motorcycle to pass MOT requirements. However, riders should be aware of local regulations and environmental considerations before proceeding with catalytic converter removal.

The included exhaust pipe cover serves multiple practical purposes beyond aesthetics. The black alloy shield effectively directs heat away from sensitive components, prevents accidental contact burns, and protects the exhaust pipe from minor impacts and cosmetic damage. The shield’s black finish coordinates beautifully with the ZR900’s aggressive styling, creating a cohesive racing-inspired appearance.

Installation Considerations for Your Exhaust Pipe Cover System

Installation requires cutting the standard exhaust headers at specific points clearly marked in the accompanying documentation and product photographs. While this may seem daunting to inexperienced mechanics, the cutting points are straightforward, and the process is well within the capabilities of home mechanics with basic tools and reasonable mechanical aptitude. A quality pipe cutter or angle grinder with cutting disc makes quick work of removing the factory cat box.

After cutting, the new de-cat pipe simply slides into position and is secured with the supplied high-quality clamp. The included brackets attach to existing mounting points, ensuring the new pipe is properly supported and aligned. The entire installation typically requires between one and two hours, depending on your mechanical experience and available tools.

Our exhausts are manufactured to deliver maximum power without necessarily requiring fueling modifications. However, if you’ve already installed an aftermarket air filter or made other performance modifications alongside this de-cat system, having your motorcycle’s fueling professionally mapped or adjusted will maximise performance gains and ensure optimal engine efficiency across the entire rev range.

For riders seeking similar performance upgrades for other Kawasaki models, the Kawasaki ZR900RS Cafe 2022 Stainless De-cat exhaust pipe offers comparable benefits for that specific model year and variant.

Frequently Asked Questions About This Exhaust Pipe Cover and De-Cat System

Will this fit my 2016 or 2022 Kawasaki ZR900?
No, this specific kit is designed exclusively for 2017 through 2021 model years. Different model years may have variations in exhaust routing and mounting points that prevent proper fitment.

Do I need to remap my motorcycle after installation?
Not necessarily. The system is designed to work with standard fueling. However, if you have other performance modifications such as an aftermarket air filter, professional mapping will optimise performance.

Is the heat shield cover essential?
While not absolutely essential for function, the heat shield cover provides important protection against heat-related damage to surrounding components and prevents accidental burns. It’s highly recommended and included at a 50% discount with the pipe.

Will this pass UK MOT inspection?
Motorcycles undergo noise testing, not emissions testing, during MOT. With a road-legal silencer fitted, you should pass MOT requirements, though riders must comply with all applicable local regulations.

This Kawasaki ZR900 performance exhaust pipe and black alloy shield cover represents exceptional value for riders seeking meaningful performance improvements, substantial weight savings, and enhanced aesthetics. The combination of precision engineering, quality materials, and comprehensive fitment makes this upgrade one of the most effective modifications available for your ZR900 motorcycle.

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