GRAIL exhaust suitable for Audi R8 V10 (OPF) – valved exhaust

Grail exhaust system for Audi R8 V10 with OPF 

Loud but Legal

GRAIL valve exhaust systems with ECE type approval can be used on your EU vehicle without registration. They are made of high-quality L304 stainless steel, handcrafted in Germany, it produces a distinctive sound that will give you goosebumps the first time you start your engine.
If you are driving an imported vehicle with a vehicle registration certificate, please check before purchasing whether you need to have the exhaust system registered in your vehicle documents.

Loud – maximum volume

You ride your GRAIL loud but legally.

With the intelligent control you get the legal maximum out of your engine sound.

The use of highly effective silencers allows for maximum volume and wonderful engine sound outside of the test areas, because only in these areas are the flaps of your GRAIL closed and only when closed is the rear silencer part of the exhaust flow.

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 custom-developed mufflers, which are developed and customized for your vehicle in the GRAIL sound lab. The combination with solid flaps is designed not only 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 will be no louder than the stock system. Using the highest quality and materials, we achieve the unmistakable delta between loud and quiet that has been unparalleled for years.

All brands, model designations and manufacturers named in this shop, such as AUDI, BMW, Hyundai, Kia, Toyota, VW, Tesla, serve solely to describe the compatibility of our products. They have no connection with the respective brand owners, and unless expressly stated otherwise these are not original parts from those manufacturers.

FLOW DOWN® is an independent supplier of tuning and accessory parts. The brand names are used purely for orientation and imply no cooperation, licensing or approval by the respective rights holders. All trademark and naming rights remain with their respective owners.