BMW G20/G22 M340i/M440i Racing Valved Exhaust system | GWAPOTech JAPAN
The exhaust system for BMW G20/G22 M340i/M440i consists of:
Downpipe
Center Pipe
Rear Exhaust System
First, let's introduce the front downpipe.
This is the stock downpipe for the B58 engine, which includes a large catalytic converter due to strict emissions regulations in Europe, naturally reducing the sound volume.
Our company offers a straight-through option without a catalytic converter or a 200-cell sports catalytic converter (available as a paid option). This not only increases volume but is also highly effective for weight reduction and power-up tuning.
Next, following the downpipe, is the essential cat-back system for sound tuning. Here, we will introduce the rear exhaust system and center pipe simultaneously.
The stock center muffler has multiple large silencers, severely restricting exhaust efficiency.
Naturally, this limits the sound range and volume, preventing the B58 engine from achieving its full potential.
Theoretically, making this part straight can significantly increase volume, but without considering the shape of the left and right pipes, it can lead to unpleasant and poor-quality sound.
Our company has developed a center muffler with pipes of nearly equal length. The biggest advantage of this center pipe is that it minimizes sound distortion and maintains sound output even at high RPMs.
The center pipe is compatible with the stock rear exhaust system and downpipe, so it can be replaced individually.
The rear exhaust system adopts a variable valve system that allows the sound volume to be switched according to usage.
To emphasize the ON/OFF of the valve, a larger silencer is used, making the silent mode as quiet as the stock silent mode. This gentleman's spec ensures safe driving at night and in residential areas.
When the valve is open, it unleashes the full potential of the B58 engine, producing a racing sound, making it a sound tuning item that enhances everyday driving experience.
We also offer a variety of options for exhaust tips, allowing you to choose the best design to match your vehicle's image.
Wholesale prices are also available, so please feel free to contact us!
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