Fits 2019–2024 · Stage 1 and Stage 2 · Mail-in
$2,999
Stage 1
780hp
740lb-ft
From 563 hp / 590 lb-ft stock
The car
Audi sells the D5 S8 in the US only with the long wheelbase, where the D4 before it used the standard one. Under the hood is again a 4.0-liter V8 with two turbochargers, now working with a 48-volt mild-hybrid system, and the eight-speed Tiptronic and quattro with a sport differential carry over.
Much of the new hardware is in the chassis. When the car launched, Audi of America made predictive active suspension and dynamic all-wheel steering standard, so the rear wheels steer as well as the front; its later technical specifications list sport adaptive air suspension instead of the predictive system. Audi quotes 0–60 mph in 3.8 seconds and an electronically limited 155 mph.
Earlier cars, including the S8 plus, are listed on the S8 (D4) page.
Stage 1 is calibrated for the car as it left the factory and takes it from 563 hp and 590 lb-ft to 780 hp and 740 lb-ft on pump-grade fuel. Stage 2 is calibrated for supporting bolt-on modifications and high-octane fuel, for 800 hp and 760 lb-ft. The gearbox has its own controller and torque limits, so the optional TCU tune raises them to match, with sharper shifts and stronger clutch clamping.
Figures & prices
Factory and tuned horsepower and torque from our catalog, with prices for each stage and add-on.
| Model year | Factory | Stage 1 | Stage 2 | Add-ons |
|---|---|---|---|---|
| 2019–2024 | 563 hp / 590 lb-ft | 780 hp / 740 lb-ft $2,999 | 800 hp / 760 lb-ft $2,999 | TCU tune $2,499 |
Tuned figures are estimates, not guarantees. Actual results vary with the car’s condition and modifications, fuel quality and octane, temperature, altitude and the dyno used. See our Terms of Service.
How it works
Choose your year, stage and add-ons and check out securely.
Pack it with your printed order confirmation email and send it to our Phoenix shop.
Within two business days of it arriving.
Return shipping is on us. Reinstall and drive.
FAQ
More answers in our FAQ
Our online catalog lists Stage 1 and Stage 2 tunes for 2019–2024 Audi S8 (D5) models. Choose your year at the top of the page; the figures and prices are the same for every year.
In the US every D5 S8 has the long wheelbase and a 48-volt mild-hybrid system, and early cars came with predictive active suspension and all-wheel steering. The D4 used the standard wheelbase without mild-hybrid assistance, and from 2016 it was sold as the S8 plus. The D4 has its own page, S8 (D4).
Audi of America listed predictive active suspension and dynamic all-wheel steering as standard when the D5 S8 launched. Its later technical specifications, for 2022 and 2025, list sport adaptive air suspension instead, so the suspension fitted can differ by model year.
Stage 1 is calibrated for the car as it left the factory and runs on pump-grade fuel. Stage 2 pairs the calibration with supporting bolt-on modifications such as downpipes and runs on high-octane fuel. On a 2024 car, Stage 1 takes it from 563 hp to 780 hp. Stage 2 takes it to 800 hp.
A TCU tune is available as an add-on ($2,499). It raises the transmission’s torque limits and sharpens the shifts so the gearbox can handle the extra power. Ship your TCU in the same box as your ECU.
More Audi tunes
Contact
Customers across the US order online and mail us their ECU. Our shop is at 952 W Melinda Ln, Suite D in north Phoenix (Deer Valley, 85027), and local owners are welcome to bring their car in. Call, visit or send us an inquiry.