2 IN / 2 OUT
Sport Silencers

Engineered to deliver the best air-cooled sounds and no drone all in a muffler that lets you choose the loudness.

The GTk Active Muffler Line from Ächtung Kraft is designed to deliver the right sound, performance, no drone and personalized choice in the loudness you want for your Air-Cooled Porsche 911 Flat-Six 911, 914, 964 and Carerra.

The GT/k Active Muffler from Achtung Kraft – the perfect addition to your classic Porsche. This high-performance muffler is designed to optimize your Porsche's performance using the latest active muffler technology, while retaining the classic air-cooled Porsche sound that you know and love. Its active valve system allows you to adjust the exhaust note, giving you a deep, rich tone when closed, and an aggressive race car-inspired sound when opened. It's the ultimate way to enhance your Porsche's performance without sacrificing its iconic sound. Our Active GT/k Muffler offers FOUR distinct sound profiles to ensure that drivers have the flexibility to tailor their vehicle's sound to any occasion, driving style, or personal preference. We have tuned each mode to keep a more mild idle, while unleashing the sounds when the revs climb. With the ability to switch between Touring/Sport (with the silencer insert) or Rebel/Rowdy (no insert), Porsche enthusiasts can enjoy a versatile and dynamic auditory experience, progressively increasing in aggressiveness and loudness, all from a single muffler.

TOURING - CLOSED - with Silencer
The Touring sound profile is tailored for those seeking a refined and sophisticated exhaust note. It provides a mellow and subtle sound, allowing for a comfortable and relaxed driving experience. It is perfect for daily commuting, long highway drives, or occasions when a discreet and elegant exhaust note is desired. Touring mode delivers a sporty exhaust note that is great for everyday drives.

SPORT - OPEN - with Silencer
The Sport sound profile offers a more dynamic and spirited exhaust tone, enhancing the driving experience with a noticeable presence. It provides a deeper and throatier sound, amplifying the engine's performance characteristics when over 2k RPM. Sport mode delivers a satisfying growl and increased volume compared to the Touring mode, ideal for spirited driving on winding roads, or when desiring a more engaging driving experience.

REBEL - CLOSED - NO Silencer
For those seeking a more aggressive and attention-grabbing exhaust note, the Rebel sound profile delivers an assertive and powerful tone. It combines a deep rumble with increased volume, making a bold statement and turning heads wherever you go. Rebel mode is suited for those who want their Porsche to be noticed, and prefer a strong and captivating sound, while still maintaining a refined edge.

ROWDY - OPEN - NO Silencer
The Rowdy sound profile represents the pinnacle of intensity and performance-oriented sound. On throttle, it unleashes an aggressive and thunderous exhaust note that demands attention and announces your arrival. Rowdy mode delivers an exhilarating symphony of sound, providing an experience for those who seek the ultimate in auditory excitement. It is perfect for spirited drives, Rallyes, track days, or anytime you want to showcase the raw sound of your flat-six.

Disclaimer: Please note that our products are designed and intended for off-road use only. The use of our products on public roads and highways is prohibited by law in many areas. It is your responsibility to ensure that the use of our products complies with all applicable laws and regulations in your area. Any use of our products on public roads and highways is at your own risk and could result in damage to your vehicle, injury or even death. By purchasing and using our products, you acknowledge that you have read and understood this disclaimer, and you accept all responsibility and liability for any consequences that may arise from the use of our products.

Please note: This part is on special order terms. Delivery time is normally 8-10 weeks. It is not a subject to cancellation or return if not required.


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AKEXH

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Exhaust conversion set, free-flow, with loose 84 mm tail pipes.

Fits:
Porsche 911 3.2L 08/1983-07/1989

Material: Stainless Steel
Number of Inlets / Outlets: 2/2
Surface: Blank

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1620000210

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Rear exhaust, Sport, Stainless steel, Dual 70 mm outlet pipe. Heat exchanger conversion.



Fits:
Porsche 911 Carrera Sport 3.2L 08/1983-07/1989

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1620611700

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Rear sport exhaust box, 2 inlets - 2 outlet, Ø84 mm tail pipes. Only to be used with SSI or straight through heat exchanger systems
All polished stainless steel.



Fits:
Porsche 911 3.2L 1984-89

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91122092512SD

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Rear sport exhaust box, 2 in - 2 out Ø84 mm loose tail pipe. To be welded on the exhaust. Polished stainless steel.



Fits:
Porsche 911 Carrera SPORT 3.2L 08/1983-07/1989

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91122092512SDL

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Rennline sports exhaust valved titanium. 



Fits:
Porsche 911 - 1965 to 1989

For cars with (1965-1974) early style heat exchangers/headers

Product Description

Elevate the sound and performance of your Porsche 911 with this lightweight titanium valved exhaust system by Rennline. Designed for enthusiasts, it features dual vacuum-actuated valves that let you control the exhaust note instantly. When closed, it delivers a sporty enhancement over the stock sound. Open the valves, and you'll release a deep, race-inspired roar during acceleration, accompanied by an exhilarating rasp on deceleration that’s sure to send chills down your spine. Best of all, there’s no drone or harsh tones—just the pure, balanced music of your engine.

This exhaust is a direct bolt-on replacement for vehicles with dual header-to-muffler flanges, allowing for a seamless installation and easy reversibility to stock. While the factory exhaust weighs approximately 25 lbs, this titanium upgrade comes in at just 12.88 lbs—saving you over 12 lbs while transforming your driving experience.

Product Fitment:

• 1965-1973 with early style headers/heat exchangers
• 1974-1989 with retro-fit early (1965-1973) style headers/heat exchangers

Not sure if it fits? The center-to-center measurement for the muffler inlet is 22.875".

Upgrade your Porsche’s sound and shed weight with this ultimate performance exhaust!

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EX29.2

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Sports exhaust conversion kit without catalytic converters. 

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989

Material: AISI304 Stainless Steel
Number of Inlets / Outlets: 2/2

Upgrade your 3.2-litre Carrera engine with our high-performance free-flow exhaust system. Designed to deliver a significant boost in horsepower, this system features Ø41mm OD pipework and a Ø60mm inflow for optimal power output. Engineered for precision, it integrates seamlessly with standard G-model tinware, eliminating the need for additional replacements.

Equipped with O2 sensors on both sides and twin Ø70mm tailpipes, the system not only enhances engine performance but also delivers a richer, more dynamic exhaust note.

Constructed entirely from robust AISI304 stainless steel, this system is built for durability and long-lasting performance. Its precision design ensures perfect compatibility and hassle-free installation, making it the ideal choice for enthusiasts seeking to elevate their engine's capabilities without major modifications.

• Instant Performance Gains: A noticeable boost without complicated installs.
• Amazing Sound: This system doesn't just improve performance—it delivers an aggressive, powerful sound.

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1620802710

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Sports exhaust set with two 84mm tailpipes - Polished stainless steel.

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989

Sports Exhaust package with two Ø84 mm tail pipes, heat exchangers and oil pipe set for the 911 3.2 Carrera.

OEM style with no modifications of engine tinware needed for installation. 

Made of polished stainless steel

Material: Polished Stainless Steel
Number of Inlets / Outlets: 2/2
Surface: Blank

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1620803010

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Sports exhaust conversion set with catalytic converters, with two 70mm tail pipes.



Fits:
Porsche 911 3.2ltr 08/1983-07/1989

Material: AISI304 Stainless Steel
Number of Inlets / Outlets: 2/2

Conversion of a performance optimized 3.2 Carrera engine into a free-flow system. This system is specifically engineered to generate increased HP from an enhanced engine by using Ø41mm OD pipework in combination with Ø60mm inflow to the exhaust. O2 sensor (Lambda) fitted to both left and right side.

Made from AISI304 stainless steel, there is no need to replace or modify the engine tinware as system design allows to fit with standard G-model tinware.
Tail pipe outlet is Ø70mm for optimizing the sound from this system.

• Instant Performance Gains: A noticeable boost without complicated installs.
• Amazing Sound: This system doesn't just improve performance—it delivers an aggressive, powerful sound.

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1620802810

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