Will the Fabspeed Sport Cat Downpipes fit my Mercedes-AMG GT?

The Fabspeed Sport Cat Downpipes fit the M178 Mercedes-AMG GT from 2015 to 2021, the GT S from 2015 to 2020, and the GT R from 2017 to 2021, all with the 4.0-liter twin-turbo V8. They are not designed for the AMG GT Black Series. Confirm your exact model and year before ordering.

How much power do they add, and how do they sound?

Fabspeed's in-house Dynojet testing showed gains of around 10 wheel horsepower and 10 ft-lbs of torque, along with noticeably faster turbo spool and a throatier V8 note. Because the HJS cores flow far more freely than the Factory Equipment, they also leave plenty of flow headroom for a tune, which is where the larger gains come from.

What are the Fabspeed Sport Cat Downpipes made from?

They use German-made HJS 200-cell high-flow sport catalytic converters in mandrel-bent 14 to 16 gauge T304L stainless steel, each downpipe laser-scanned and CAD-designed for a precise OEM fit. T304L resists heat and corrosion for the life of the car, and HJS is a long-established original-equipment emissions maker. Fabspeed backs them with a Lifetime Warranty.

Will they trigger a check engine light?

They are designed and optimized to run without triggering a check engine light on US cars. If a light does appear after installation, it usually points to an unrelated sensor or a pre-existing fault rather than the sport cats themselves.

Is installation difficult?

Yes, it is manageable. Each downpipe is laser-scanned and CAD-designed to bolt into the factory location, so no cutting or welding is required and a capable shop can fit them in a few hours. No tune is required to run them, though many owners add one to make the most of the extra flow.

Are they CARB approved or street legal?

No. These sport cats are not CARB approved and are not for sale in California or other states that require CARB certification, and no assessment has been made regarding EPA anti-tampering compliance. The buyer is responsible for confirming what is legal in their area before installing.

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Description

Fabspeed High Flow Downpipes for Mercedes-AMG GT / GTS / GTR

The Fabspeed High Flow Downpipes for the Mercedes-AMG GT, GTS, and GTR models represent the pinnacle of performance enhancement, expertly engineered to deliver faster turbo spool and significantly reduced turbo lag. This results in a noticeable increase in power across the RPM band, ensuring a more responsive and exhilarating driving experience. At the core of these downpipes are the HJS German Imported H.D. Euro 6 sport cats, renowned for their exceptional flow characteristics and compliance with stringent emissions standards. Precision is key to Fabspeed’s approach, with each downpipe being laser scanned and CAD designed to guarantee perfect OEM fitment, ensuring a seamless integration with the vehicle’s existing systems.

Features

Faster turbo spool and reduced turbo lag
More power across the RPM band
HJS German Imported H.D. Euro 6 sport cats
Laser scanned and CAD designed for perfect OEM fitment
Constructed from high quality 14-16 gauge mandrel bent T304L stainless steel
Simple bolt-on installation, no cutting or welding required
No check engine light, guaranteed
All Fabspeed performance products are backed by the Fabspeed lifetime warranty

Applications

Mercedes-AMG GT: 2015-2021 | 4.0L TT V8
Mercedes-AMG GTS: 2015-2020 | 4.0L TT V8
Mercedes-AMG GT R: 2017-2021 | 4.0L TT V8

Notes

All Fabspeed products are expected to ship within one to two weeks of order, though timelines are often much quicker
High flow downpipes are not designed for the AMG GT Black Series

Frequently Asked Questions

Will the Fabspeed Sport Cat Downpipes fit my Mercedes-AMG GT? The Fabspeed Sport Cat Downpipes fit the M178 Mercedes-AMG GT from 2015 to 2021, the GT S from 2015 to 2020, and the GT R from 2017 to 2021, all with the 4.0-liter twin-turbo V8. They are not designed for the AMG GT Black Series. Confirm your exact model and year before ordering.
How much power do they add, and how do they sound? Fabspeed’s in-house Dynojet testing showed gains of around 10 wheel horsepower and 10 ft-lbs of torque, along with noticeably faster turbo spool and a throatier V8 note. Because the HJS cores flow far more freely than the Factory Equipment, they also leave plenty of flow headroom for a tune, which is where the larger gains come from.
What are the Fabspeed Sport Cat Downpipes made from? They use German-made HJS 200-cell high-flow sport catalytic converters in mandrel-bent 14 to 16 gauge T304L stainless steel, each downpipe laser-scanned and CAD-designed for a precise OEM fit. T304L resists heat and corrosion for the life of the car, and HJS is a long-established original-equipment emissions maker. Fabspeed backs them with a Lifetime Warranty.
Will they trigger a check engine light? They are designed and optimized to run without triggering a check engine light on US cars. If a light does appear after installation, it usually points to an unrelated sensor or a pre-existing fault rather than the sport cats themselves.
Is installation difficult? Yes, it is manageable. Each downpipe is laser-scanned and CAD-designed to bolt into the factory location, so no cutting or welding is required and a capable shop can fit them in a few hours. No tune is required to run them, though many owners add one to make the most of the extra flow.
Are they CARB approved or street legal? No. These sport cats are not CARB approved and are not for sale in California or other states that require CARB certification, and no assessment has been made regarding EPA anti-tampering compliance. The buyer is responsible for confirming what is legal in their area before installing.

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Fabspeed High Flow Downpipes for Mercedes-AMG GT / GTS / GTR [FS.MER.GT.SC]

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Fabspeed High Flow Downpipes for Mercedes-AMG GT / GTS / GTR

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Notes

Frequently Asked Questions

About Fabspeed

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