Grail exhaust system suitable for Audi RS6 C8 Avant (4.0 TFSI V8-Biturbo Mild-Hybrid) – valved exhaust system

The Audi RS6 C8 Avant (from 2019) takes the 4.0 TFSI twin-turbo V8 to 600 hp as a mild hybrid - and to 630 hp in the Performance version (from 2023). Commanding, powerful, in an estate body with Audi's usual build quality. The GRAIL valved exhaust system unlocks the full acoustic potential of that twin-turbo V8: deep, dark, with a clear eight-cylinder character. Made from L304 stainless steel, CNC-machined to close tolerances, with ECE type approval - no registration required on any EU vehicle with standard type approval.

Valve control via the Audi Drive Select driving modes

The valves are controlled by the factory Audi Drive Select valve control of your RS6. In Dynamic or RS mode the valves open; in Comfort or Auto mode they stay closed.

Configurator - choose the exhaust tip finish

The system comes in three exhaust tip versions:

• Quad round 115 mm (stainless steel): four bold round tips in polished stainless steel - the classic sporty statement
• Quad round 115 mm (black): the same quad layout in a matt black finish - matches the RS black package
• Twin oval 220 × 115 mm (black): two wide oval tips in black - a near-factory look with a distinctive accent

Highlights

• Specifically suitable for the Audi RS6 C8 Avant with the 4.0 TFSI twin-turbo V8 (600 / 630 hp Performance)
• Three exhaust tip versions: quad round (stainless steel/black) or twin oval (black)
• ECE type approval - no registration required within the EU
• L304 stainless steel, CNC-machined components
• Developed and made in Germany

Ordering with fitting at FLOW DOWN®

FLOW DOWN® is an official GRAIL partner in the Ruhr region. When you order with fitting:

• 50 % deposit when you place the order - we then order the system from GRAIL
• As soon as it arrives at our workshop, we arrange the fitting appointment
• The balance is only due after fitting - not before

Payment by advance transfer only, no PayPal. Swiss suitability certificate available for a surcharge - simply contact our support team.

Compatible vehicles

• Audi RS6 C8 Avant (4.0 TFSI twin-turbo V8 mild hybrid, 600 hp), from 2019
• Audi RS6 C8 Avant Performance (4.0 TFSI twin-turbo V8, 630 hp), from 2023
• With quattro all-wheel drive (standard on the RS6)

Not suitable for: Audi RS6 C7 (previous generation, with its own system), Audi S6 C8 (different engine), Audi RS7 C8 (Sportback body, with its own system).

Scope of delivery

• GRAIL valved exhaust system suitable for Audi RS6 C8 Avant (in deiner gewählten Endrohr-Variante)
• Mounting hardware
• ECE type approval

Road-legality notes

No registration required thanks to ECE type approval for EU vehicles with standard registration. For imported vehicles, or in combination with software tuning or a modified downpipe, please check with our support team first.

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.