Porsche 911 991 GT3/GT3RS F1 Sound Valved Exhaust system | GWAPOTech JAPAN
The Porsche 911 991.1/991.2 GT3/GT3RS muffler consists of ① exhaust manifold and ② rear exhaust.
First, let's take a look at the sound tuning of the rear muffler for the 911 991.1/991.2 GT3/GT3RS.
We employ a sound layout in our rear mufflers that pursues both high-pitched tones and beautiful sound quality.
Due to its unique design, adjusting all pipes to match the vehicle's limits required nearly two years of development, but we have achieved an uncompromising ultimate specification.
Firstly, each side's circular design aims for a clean sound like a musical instrument by maximizing the length of the pipes and ensuring smooth exhaust flow.
Secondly, our rear mufflers feature two types of tailpipe designs.
These are implemented to cater to the following two purposes:
- A design that prioritizes valve ON/OFF operation while seeking high-pitched tones.
- A sound-oriented design that emphasizes high-pitched tones with minimal muffling effects.
A common detailed design is at the X section where pipes cross, causing exhaust collisions between the left and right banks to elevate high-pitched tones during high-speed operation.
Furthermore, the specification emphasizes variable functionality. Even in straight mode, it features large tailpipes to ensure maximum exhaust flow. Special mechanisms within the tailpipes eliminate exhaust interference factors during straight mode. Additionally, during silent mode, calculations of piping, punching, and glass wool ensure maximum noise reduction capability, embodying a gentleman's specification that matches OEM standards.
Lastly, the sound tuning component we introduce is the Headers.
From the factory, due to unequal short tubes and the presence of catalysts, the sound volume is very low, and the sound quality cannot achieve high tones.
Therefore, we have developed equal-length long-tube exhaust manifolds with F1 sound specifications not only for the Carrera series but also for the GT3/GT3RS models.
By designing the tubes longer like wind instruments and ensuring equal lengths for each tube, we have achieved high-tone sound and a beautiful tone without distortion.
For those seeking ultra-high-tone sound, we recommend replacing not only the high-tone specification rear exhaust but also installing our equal-length long-tube exhaust manifolds.
Furthermore, our Exhaust tips are designed to bolt onto the rear muffler section securely, ensuring they remain in place even during circuit driving.
We also offer wholesale prices, so please feel free to contact us for inquiries!
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