Porsche 718 Boxster/Cayman HJS German 200CPSI Sport Catalytic Converter

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Why We Choose HJS Catalytic Converters: 

HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light.    

Increase exhaust flow by replacing the restrictive factory ceramic 750cell catalyst for a high flowing German imported 200-cell HJS HD EURO 6 certified catalyst to unlock the ideal blend of performance, efficiency, and increased exhaust tone.                    

Fabspeed Motorsport is the largest distributor of premium HJS catalysts in North America, and second largest in the world. Based off years of engineering experience and worldwide testing we've selected the ideal catalyst to unlock performance from the factory exhaust system. This German imported 200 cell HJS HD catalyst is the top of the line solution to increase exhaust flow, resulting in a satisfying increase in turbo sound to match the extra horsepower gains. This specific catalyst has proven itself in numerous Ferrari and Lamborghini applications - able to withstand extreme abuse while preventing any check engine lights. The HD designation signifies the incorporation of a brazing stripe and special mantles to hold the metal matrix in place through the toughest of conditions while ensuring the overall integrity of the catalyst. The best part - increased performance without a check engine light and no tune required. All of this was 1st pioneered by Fabspeed research and development- as we got the worlds very 1st 718 Porsche 4 cylinder turbo and invested the time and resources to make Porsche people the best catalytic converter solution. 

The portion of the exhaust that contains the catalyst is a rather large component, making a full replacement section costly. Our elegant "Slip-ON Design" design incorporates a OEM style Torca clamp for easy installation into the factory double walled exhaust configuration - simple cutting is required for installation. The 718 stock catalytic converter can easily and quickly be bolted on to make the 718 exhaust back to stock at any time utilizing the same  OEM quality torca clamp. Its super simple and all completely hidden under the cars sheet metal covers. Its all undetectable. Simple cutting is the logical and smart way to accomplish a HJS German sport cat or catbypass pipe. If you 718 is ever in an accident Porsche AG specifies cutting and replacing exhaust components. Its logical.         

The addition of Fabspeed's Sport Catalytic Converter added 8.5 HP and 18 ft-lbs of torque peak power gains when tested on our Dynojet on a stock vehicle. 13 whp and 17ft-lbs at 4000 will make a significant difference in drivability. We look forward to extracting even more power with our hardware in conjunction with a tune at a later date.    

IMPORTANT NOTE: Simple cutting of the factory exhaust pipe is required, but is simple and reversible at any time. Please see our Installation Instructions to gauge your ability to perform the installation. If you have any doubts - please contact us for a referral to your local Fabspeed dealer / installation center.


  • Fits all Porsche 718 Boxster/Cayman Base/S Models (2017+)

  • Improves power, sound, and throttle response by decreasing back pressure and increasing exhaust flow

  • Optimized for maximum performance with NO check engine light, guaranteed

  • Designed with high flowing German imported 200-cell HJS HD catalyst for the ideal blend of performance and efficiency

  • Constructed from high-quality .065" thick T304L stainless steel for optimum flow and maximum durability 

  • Designed and built in-house at Fabspeed in our full precision machine shop

  • Includes integrated O2 sensor bung in factory location

  • Included Torca clamp allows for reinstallation of factory catalyst at any time

  • Fabspeed performance products are backed by Fabspeed's Lifetime Warranty

DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product contains a High-Flow Sport Catalytic Converter solely intended for track and race cars as it is NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.

2 Reviews

  • 5
    2019 718 GTS Performance

    Posted by Patrick - Hyphen Motorsports on 1st Jul 2020

    I installed this sport cat along with a set of carbon fiber tips, and it gives the car a whole new sound and allows it to breathe. Also paired it with a Fabspeed ExperTune, and I have a whole new vehicle. The car is a beast, and is so fun to drive. In normal mode the exhaust sounds like stock. The cracks and pops in Sport are a tad bit louder, but not enough to be distracting. I LOVE that I can hear the turbo now. That sounds makes me smile.

  • 5
    2017 718 Cayman S transformed

    Posted by Anthony on 7th Jul 2019

    I combined this high flow cat along with an ECU tune and my 718S is a monster. It sounds terrific with a deeper/raucous sound especially when in Sport and Sport + modes, but docile and unassuming during the normal mode. There is a noticeable and welcome turbo whirl sound and a deeper cold start. However, put the PSE system into Sport and or Sport + and the sound that emanates is terrific with the proper downshift pops and crackles.

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