The perfect combination: flap exhaust systems and HJS downpipes
Combine a Grail valve exhaust system with high-quality HJS downpipes to take the performance and sound of your vehicle to the next level. Discover the world of Grail valve exhaust systems today and experience the synthesis of performance and sound that will transform your vehicle into a true masterpiece. Our flap exhaust systems, as well as the HJS downpipes, have ECE type approval, which means that they can be driven without registration in the EU and Switzerland. Please note that US vehicles may have additional requirements.
Performance and sound according to your wishes
Our flap exhaust systems offer performance-enhancing exhaust routing and the option of customizing the exhaust sound to your liking. With precise manufacturing and high-quality materials, they guarantee a perfect fit and reliability.
Our passion for car enthusiasts
At Grail, we share a passion for cars with discerning drivers. Our goal is to offer the best solutions for customization and the highest quality. Explore our products and turn your vehicle into a true work of art.
| Manufacturer |
Series |
Model |
Type |
ltr. |
kw |
Engine type |
Emission standard |
Note |
| BMW |
540i |
540i / xDrive |
G5L |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
640i |
640 i GRAN TURISMO xDrive |
G6GT |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
740i |
740i Sedan / xDrive |
7L |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
840i |
840i Convertible / xDrive |
G8C |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
840i |
840i Gran Coupé / xDrive |
G8C |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
M240i |
M240i xDrive |
G2C |
3.0 |
275 |
B58 B30B |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
M340i |
M340i xDrive |
G3K |
3.0 |
275 |
B58 B30B |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
M440i |
M440i xDrive |
G3C |
3.0 |
275 |
B58 B30B |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| BMW |
Z4 |
Z4 M40i |
G4Z |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
| TOYOTA |
SUPRA |
Toyota Supra |
JTSC |
3.0 |
250 |
B58 B30C |
Euro 6d - OPF |
V-band clamp |
| V-band clamp |
Product safety information
Manufacturer information:
HJS
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