Open Monday - Friday

Fabspeed Porsche 992 GT3 / GT3 RS RENNKRAFT® Modular GTLM Exhaust Package (2022+)

0 reviews Write a Review
$9,346.95 - $10,336.95
Calculated at Checkout
HP (whp) / (crank):
+31 / +35
TQ (ft/lbs):
WT (lbs) / (KGs)::
-18lbs / 8.2kg

For all 992 GT3 and 992 GT3 owners drivers worldwide this is a complete 992 GT3 long tube headers to tips exhaust solution for ultimate weight savings and performance. The Fabspeed RennKraft® system  features our U.S. patented RENNKRAFT® system- this allows Catted and NO cat systems in a modular PATENTED design.  Designed and guaranteed to be the most powerful emissions compliant exhaust system possible. We used all 25+ years of Porsche exhaust design experience and our finest manufacturing techniques to engineer this incredible modular system. Fabspeed Motorsport engineering started with the headers. From our experience designing our 991/991.2 GT3 Long Tube Headers, We knew that “long tube” headers were essential for making BIG power on the GT3 platform. After dozens of dyno runs and many revisions to runner length, diameter, and  pyramidal F1 Indycar merge collector design we moved on to CAD designing the catalytic converters and rear section. With perfectly optimized headers and EMITEC HJS German imported high-flow racing catalytic converters, there was no room to fit the factory muffler section, so that went out the window. In its place we implemented extra large 200 cell HJS cats and our signature investment cast CAD designed  70mm 2.75" X-pipe. These cats flow so much better than stock, that we only gained 1-2 peak WHP when we tested the system with no cats. You can see the dyno graph for yourself above. Finally, after much testing we found that our cast X-pipe provided some significant gains from 3-6K RPM when compared to a simple crossover tube or 2 separate "easy lazy to make" 90 degree pipes. With the patented RENNKRAFT® system, you can easily swap between catted and cat bypass using the quick release v-band clamps (patent pending). So if you’re going to the track for Endurance Racing you can swap in cat-bypass pipes for endurance Racing Competition events. BUT you can rest assured with Emitec HJS German European certified Homolgated racing catalytic converters you are leaving no extra power on the table while making maximum Clean and Green Performance. tm. 


This system is awesome as its the lightest weight emissions complaint systems that could be factory installed on any Porsche RSR GTLM GT3R factory race car. it’ll turn your GT3 into a snarling aggressive race-bred machine. This system is LOUD, it pops and gurgles, and it will absolutely scream to redline. This is at the cost of some interior drone and day-to-day livability. We have many people Wolrdwide that love this system and like the massive weight savings versus stock and OFF the rear end for better handling. This systems is 100% manufactured at Fabspeed Motorsport USA. 


This is the way; the most powerful emissions compliant 992 GT3 exhaust system on the market. Max gains of +37 HP/ 31 WHP (whp= horsepower at the wheels) and 39 ft/lbs of TQ are seen at 4250 RPM. That’s 357HP at the crank! Gains of over 20 WHP are carried all the way from 6000 RPM up to redline. Usuable power ALL across the RPM band from Fabspeed Motorsport applying over 30 years of Air-cooled and water-cooled experience.  You’re going to feel the power that this system adds to your GT3!


  • Fits all Porsche 992 GT3 and GT3 RS 2022+ Models Worldwide (This system does delete the GPF on EU cars, and will cause a check engine light for a monitored GPF system unless a simulator or tune is used)
  • Adds 31 WHP and 39 ft/lbs of TQ at 4250 RPM (37 HP at the crank)
  • Saves a massive 18lbs / 8.2 KGs versus the stock factory Porsche OEM system
  • Equal length headers with Burns Stainless Formula 1/ Indy car style high velocity merge collectors
  • 100% mandrel bent in-house and manufactured and QUALITY controlled at Fabspeed USA. 
  • Springs used for collector retention to accommodate for expansion and increase durability
  • Constructed from T321 stainless steel Mil Spec tubing- ASME specifications
  • CNC mandrel bent tubing featuring 2.75in / 70mm tubing
  •  CAD designed investment cast stainless steel flanges for maximum flow and strength
  • Modular design that uses a V-band clamp so one can quickly swap between cats and cat bypass
  • The RENNKRAFT® system has been awarded a US Patent and is the only system of its kind in the world
  • Switching to cat-bypass for track events prevents catalytic converter degradation during all out Endurance Racing competition racing abuse
  • We use German-made Emitec Tier 1 HJS HD tri-metallic 200-cell EURO 6 homologated catalytic converters for the best performance and reliability
  • Optimized for maximum performance with NO catalyst generated check engine light, guaranteed, when Sport Cats are installed
  • Comes with your choice of exhaust tips: Matte carbon fiber, mirror polished stainless steel, brushed stainless steel, Satin Black and 90 degree race turn down tips for sound control
  • Simple bolt-on installation, no cutting or welding required
  • Incrementally DYNO developed and tested versus other brands that often BUILD something/ anything and simply GOTO market with hype. Caveat Emptor. 
  • Race / Track oriented products not covered under the Sound Solutions Warranty
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty


  • For licensing of the RENNKRAFT® system, please inquire (215-646-4945)

Why We Choose HJS Catalytic Converters: 

HJS German catalytic converters are the best high-performance catalytic converters in the world. Made from the highest grade materials, they offer increased power, enhanced sports car sound, and long-term durability. In most applications, HJS German EMITEC 200CPSI catalytic converters can flow up to 90-93% of a straight pipe. While other brands of catalytic converters quickly degrade, lose power, and give the car a Check Engine Light, HJS German catalytic converters offer a guarantee of NO CEL - (NO Check Engine Lights)

Fabspeed Motorsport USA is the exclusive importer and distributor of HJS catalytic converters in North and South America. If you want to upgrade your sports car, SUV, or truck with high-flow trimetallic OBD2 European-certified homologated catalytic converters, Fabspeed is the only place to obtain 100% genuine HJS Emitec certified components. Please be aware that any other company offering HJS-equipped products should be questioned before purchase as to where they obtained HJS catalytic converters. All installation and use risks lie with the end-user and installer of these parts.

  • HJS German imported EMITEC catalytic converters are made from the highest grade materials in the WORLD.
  • HJS German-proven catalytic converters offer the world's very best high-performance power increases along with enhanced Sportscar sound and long-term proven durability.
  • HJS German EMITEC 200CPSI catalytic converters can flow up to 90-93% of a straight pipe in most applications.
  • Fabspeed Motorsport USA was appointed 20 years ago as HJS Emissions Technology Menden Germany as HJS Exclusive importer and distributor for all of North and South America.
  • When you purchase HJS catalytic converters and or Fabspeed systems equipped with HJS catalytic converters the PURCHASER is 100% ASSURED that they have received Genuine certified high-performance HJS components imported directly from HJS Emitec Germany.
  • Fabspeed HJS German tri-metallic catalytic converters are State of the Art ultimate emission legal performance-enhancing components.
  • Your sports car, SUV, and Truck equipped with HJS German catalytic converters is 100% Guaranteed to make more Horsepower, Torque, enhanced sports car, and better fuel economy than any OEM stock catalytic converter and or ANY Illegal Cat Bypass Downpipe.
  • Fabspeed HJS German high-flow trimetallic OBD2 European Certified Homologated catalytic converters ensure a guarantee NO CEL - NO Check Engine Lights.
  • Fabspeed uses HJS high-flow cats because they are the best in the world and offer the highest quality and performance in the market.

 If you'd like to learn more, click here to watch our video about HJS catalytic converters.

Returns Policy

To RETURN any system, product or merchandise you must contact us first for a Return Authorization (RA) Number. Special order and custom made systems, apparel, Carbon Fiber Wall Art, and other certain merchandise are NOT returnable. ALL SALES ARE FINAL. To return a Fabspeed Motorsport product an RA number must be requested and if granted the item(S) must be in original Fabspeed Motorsport sealed packaging. A copy of the original invoice and a brief explanation must accompany all returned items. You must follow our instructions for returning items carefully, or Fabspeed Motorsport reserves the right to charge a 25% restocking fee on any OPENED box or repackaged products. Customers are responsible for return shipping charges. If an order was shipped with a promotional “Free Shipping”, and the order is returned, we exclusively reserve the right to charge the customer or distributor for the cost of that original shipping and handling. If a Fabspeed Motorsport Performance package is ordered, and an individual component of that package is returned, Fabspeed Motorsport reserves the right to charge back the performance package discount along with any additionally offered discounts. Return shipped items DAMAGED in transit will RESULT in additional charges up to and including rejection of the competent. It is the customer’s responsibility to ship safely and properly. No returns accepted after 30 days from the invoice date. No credits will be given after 30 days from the invoice date.

To qualify for return, the product must be unused and remain in the original packaging, as well as match the current design and packaging for the product at the time of return. Sounds is subjective and therefore does not qualify for a return of a used product. See Sound Solution Guarantee to see if your product is covered.

Periodically mistakes are made when ordering, or a wrong part is shipped, and you may wish to return an item. We will do everything reasonable to satisfy you. Please contact Fabspeed Motorsport immediately via email at to discuss the circumstances before returning any products. Anything returned without prior authorization from Fabspeed Motorsport will be refused. All returns must be sent back fully prepaid. Our customer service department ( will issue a Return Authorization Number, which must accompany any return. A copy of the original invoice and a brief explanation must accompany all returned items. No returns accepted after 30 days from the invoice date. No credits given after 30 days.


Fabspeed Motorsport cannot be held liable for refusal of, delay of, loss of, theft or damage to a shipment of any item. The customer agrees to indemnify Fabspeed Motorsport for all costs, fees and expenses Fabspeed Motorsport incurs as a result of any violation of any local, state, federal, national or international laws or regulations. Customer agrees to take responsibility for lost packages that were not independently insured or sent without requiring signature. The customer understands they will be liable in the event of additional fees, tariffs, or legal issues such as border seizure. Customer accepts these risks and agrees to release Fabspeed Motorsport of all liability.

Fabspeed Motorsport reserves the right to charge a shipping and handling fee on every order being shipped from our facility. This fee is universal and applies to all retail and wholesale purchases and cannot be waived or credited.

A 6% sales tax will be implemented for every purchase made by a Pennsylvania resident. This fee will be charged for in-house installations and products purchased online, over the phone, and/or via email, this fee is required by law, is non-negotiable and non-refundable.

Customer Reviews

Write a Review Hide Reviews Show Reviews

We're currently working to get more reviews for this product. In the meantime, please take a look at our reviews from other platforms.