1 IN / 1 OUT
Sports Silencers

Revolutionize your stock Porsche 911 flat-six driving experience.

The GTk Active Muffler Line from Achtung Kraft is the only muffler line on the market to deliver up to 6 levels of sound in one muffler. Don't settle for a one-trick muffler - upgrade now to the best for your 1975 to 1989 Porsche 911, 911S, 911SC and Carerra.

Engineered to bring the right sound and tone to any air-cooled Porsche and delivers a drone-free driving experience.

Elevate your driving experience with the GTk Active Muffler Line from Achtung Kraft. Designed to deliver unparalleled performance and customization, our mufflers are engineered to meet the demands of discerning drivers.

All mufflers come with our state-of-the-art Custom Control Module that allows wireless control of the different sound modes of each muffler.

1-IN versions of the GTk Active Muffler Line feature two variants to suit your specific needs:

Side-Out / Stock Exit Location:
This style bolts up to your single out stock exhaust and exits in the same side-out location as a stock muffler. This version provides easy installation without the need for additional modifications with 6 distinct sound levels at the flip of a switch. You can tailor your driving experience to match your mood or the driving conditions.

Center-Out GT3 Style Exit:
For those seeking a more aggressive look and sound, this 1-IN GTk Active Muffler offers a center-out GT3 style exit. This version delivers a bit more aggressive level of sound and performance as the side-out stock location variant, with the added benefit of a sleek and sporty GT3 style exit design and 5 modes of active sounds at the touch of a button.

No matter which variant you choose, you can count on the GTk Active Muffler Line to deliver uncompromising performance, exceptional sound quality, and unmatched versatility. Take your driving experience to the next level with Achtung Kraft.

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.



Related reference numbers
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AKEXH

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Exhaust Muffler / Silencer Rear box Replacement, Polished, stainless steel. Single Outlet With Ø60mm polished tail pipe. 

With TÜV/EEC approval

   

Fits:
Porsche 911 1974-89 2.7L / 3.0L / 3.2L.

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91122092201S

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Rear sport exhaust, Ø84mm loose outlet pipe (weld on type). Polished stainless steel. With TÜV/EEC Approval.

   

Fits:
Porsche 911SC/911 Carrera 2.7-3.0L 08/1975-07/1983
Porsche 911 Carrera 3.2L 08/1983-07/1989

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91122092502SL

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Upgrade your Porsche 911 Turbo 930 with a complete high-performance exhaust and intake system, designed to enhance power, sound, and efficiency.

Fits:
Porsche 911 Turbo (930) 1975-89 

Contents:
1.) Fabspeed Stainless Steel Single Outlet Muffler (incl. Deluxe Dual or Quad Style Tips)
2.) Fabspeed Stainless Steel Sport Headers (incl. Gaskets & Braided Oil Lines)
3.) Fabspeed Air Intake System (incl. BMC Air Filter) 

Features:
- Increases horsepower and torque by 46 whp and 33 ft-lbs
- Optimized flow enhances throttle response and turbo spool
- Delivers an aggressive yet refined exhaust note
- Manufactured from T304 stainless steel
- Features 14-16 gauge C.N.C. mandrel-bent high-velocity IndyCar/Formula 1 3-into-1 pyramidal merge collectors
- Maxflo Mufflers are radius stress-relieved, hydro-formed cases and pulse TIG welded with 2000-degree ceramic fiber and stainless steel wool packing
- Includes a drip accumulator with double swivels, Aeroquip lines with adapters, and a graphite steel-layered gasket
- Comes with custom 7/8” braided oil lines with Porsche-style OEM fittings
- Air Intake Kit replaces restrictive OEM metal intake box for improved airflow
- Direct bolt-on replacement, preventing catalyst-generated check engine lights
- Backed by Fabspeed's Lifetime Warranty

Installation Information:
- To ensure a proper header seal, tighten all exhaust bolts to the OEM torque specifications after the initial heat cycle.
- This system is designed for use with the factory turbocharger. If you have upgraded to a K27 turbocharger, please contact us to request the necessary modification from the supplier.
- This system can be fitted to factory 930 Flachbau (Slantnose) models with the purchase of the optional Slantnose oil line kit.

Disclaimer: This product eliminates the OEM catalytic converters from the vehicle and is strictly intended for closed-course competition and off-road use only. Racing Cat Bypass Pipes are designed exclusively for track and race cars, as they are not certified by the EPA or any regulatory emissions body. It is your responsibility to review and comply with all applicable local, state, and federal laws before purchasing and installing these or any aftermarket parts. The end-user and installer assume all risks associated with installation and use.

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FSPOR911TSPKGS

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