Grail exhaust system for Hyundai I30N

3 inch exhaust system Loud but Legal for your Hyundai i30N

Get a 300 € pre-order discount now when ordering by April 15, 2025.


Planned delivery end of May / beginning of June 2025.
Get a €300 pre-order discount when you order by April 15, 2025.

Experience the perfect combination of sound, performance and road legality with the GRAIL valve exhaust system for the Hyundai i30N.

Our exhaust systems are made of high-quality L304 stainless steel, handcrafted in Germany and with an ECE type approval, it can be used on your EU vehicle without registration.
For imported vehicles with a type approval, please check in advance whether registration is necessary.

Loud – Maximum volume for your i30N in 3.0 inches
Drive your i30N with maximum legal sound.

Thanks to intelligent valve control, you get the most out of your engine sound – loud and legal. Our highly effective mufflers maximize the volume outside the test range. Within the measurement range, the valves remain closed, ensuring the system complies with legal requirements.

The result? Pure engine sound and unparalleled volume, if you want it.

Your GRAIL can also be quiet.
With the GRAIL you have two vehicles in one.

Our specially developed mufflers offer maximum damping with the valves closed and impress with their powerful sound when the valves are open. Within the test range, your GRAIL is no louder than the stock system. Quality and materials ensure the impressive delta between loud and quiet, making your driving experience unique.

Flow
The GRAIL valve-valve exhaust system for your Hyundai i30N was developed to ensure optimal exhaust flow. With larger pipe diameters and minimal tapers, it sets new standards compared to the standard system. Your GRAIL lets the exhaust gases flow freely.

Solid
CNC-machined, solid stainless steel valves operate precisely within the specified measuring ranges. They offer a perfect combination of backpressure reduction and an unparalleled engine sound.

Quality Made in Germany
With GRAIL, you get the highest quality workmanship and the finest materials – developed and manufactured in Germany. Enjoy the maximum possible sound and a system optimized for your i30N.

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

FLOW DOWN® is an independent supplier of tuning and accessories. The use of the brand names mentioned is for guidance only and does not constitute a collaboration, licensing or approval by the respective rights holders . All trademark and name rights are held by their respective owners.