BMW 640i (F06/F12/F13) Valved Racing Exhaust system | GWAPOTech JAPAN
The exhaust system for BMW 640i (F06/F12/F13) consists of:
Downpipe
Center Pipe
Rear Exhaust System
It is important to note that the exhaust system differs between the early and late models, which may not be easily noticeable by visual inspection.
First, let's introduce the front downpipe.
This is the stock downpipe for the BMW F80/F82 M3/M4, but due to strict European emission regulations, it includes a large catalytic converter, 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, let's look at the essential sound tuning component after the downpipe: the cat-back system. Here, we will introduce both the rear exhaust system and the center pipe.
The stock system includes a large silencer, which reduces exhaust efficiency.
Theoretically, making this part straight can significantly increase the volume, but if exhaust efficiency is ignored and flow becomes too smooth, it can lead to sound distortion and a coarse sound quality.
Our company uses an X-pipe design at the crossover section where the left and right exhausts meet. The biggest advantage of this X-center pipe is that it eliminates sound distortion and maintains sound output even at high RPMs.
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 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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