Loud but legal
GRAIL flap exhaust systems with ECE type approval can be fitted to your EU vehicle without registration. They are made by hand in Germany from high-quality L304 stainless steel and produce an unmistakable sound that will give you goose bumps the first time you start your engine.
If you drive an import vehicle with a type approval, please check whether you need to register the exhaust system in your vehicle documents before purchasing.
Loud - maximum volume
You drive your GRAIL loud but legally.
With the intelligent control system, you get the maximum legal sound from your engine.
The use of highly effective silencers enables maximum volume and wonderful engine sound outside the test areas, because the flaps of your GRAIL are only closed in these areas and the rear silencer is only part of the exhaust flow when closed.
This is how we achieve pure engine sound and maximum volume.
Your GRAIL can also be quiet.
With a GRAIL, you get two vehicles in one.
We use specially developed silencers, which are developed and adapted for your vehicle in the GRAIL sound laboratory. The combination with massive flaps is not only designed for maximum sound output when the flaps are open, but also for maximum damping when the flaps are closed.
If you drive your vehicle within the respective test ranges, your GRAIL is no louder than the standard system. Highest quality and materials, this is how we achieve the unmistakable delta between loud and quiet, which has been unparalleled for years.
Flow
Your GRAIL has been developed in such a way that the exhaust flow is minimally affected. A significant improvement on the standard system is a matter of course thanks to a larger pipe diameter and a reduction in tapering. Your GRAIL does not get in the way of the exhaust gas.
Solid
Depending on the model, our stainless steel flaps made of CNC-milled solid material switch in the prescribed measuring ranges and thus allow the perfect combination of back pressure reduction and extreme volume from pure engine sound.
Quality Made in Germany
With a GRAIL you get what you have always been looking for. The highest processing quality of the best materials in combination with the maximum possible sound for your vehicle.
