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Audi C8 RS 6 Quattro 4.0T

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Audi C8 RS 6 Quattro 4.0T Performance ECU Software / Tuning

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Unitronic Performance Software - With UniCONNECT+ Cable

ES#4465412 - C8-4.0T-UC - Unitronic Performance Software - With UniCONNECT+ Cable - Choose the stage that meets your power goals! - Unitronic - Audi

Choose the stage that meets your power goals! This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th

Brand:
Unitronic - Corporate Logo
ES#:
4465412
Mfg#:
C8-4.0T-UC
In Stock
ON SALE!
Starting at $1614.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Plus ECU Upgrade - 4.0T EA825 V8 (RS)

ES#4405006 - ECU40TEA825RSAPR - APR Plus ECU Upgrade - 4.0T EA825 V8 (RS) - Max gains of +112 AWHP and +145 AWFT-LBS and a Limited Powertrain Warranty - APR - Audi

Max gains of +112 AWHP and +145 AWFT-LBS and a Limited Powertrain Warranty Call In Or Chat For Best Price!
This upgrade must be performed at ECS Tuning's facility in Ohio.
For vehicles up through the 2023 model year only.

Brand:
APR - Corporate Logo
ES#:
4405006
Mfg#:
ECU40TEA825RSAPR
In Stock
$3999.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR ECU Upgrade - 4.0T EA825 V8 (RS)

ES#4405005 - ECU-40T-EA825-RS - APR ECU Upgrade - 4.0T EA825 V8 (RS) - Max gains of +112-210 AWHP and +145-225 AWFT-LBS depending on octane - APR - Audi

Max gains of +112-210 AWHP and +145-225 AWFT-LBS depending on octane Call In Or Chat For Best Price!
This upgrade must be performed at ECS Tuning's facility in Ohio.
For vehicles up through the 2023 model year only.

Brand:
APR - Corporate Logo
ES#:
4405005
Mfg#:
ECU-40T-EA825-RS
In Stock
$1499.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Flashed @ ECS

ES#4465415 - C8-4.0T - Unitronic Performance Software - Flashed @ ECS - Choose the stage that meets your power goals! - Unitronic - Audi

Choose the stage that meets your power goals! This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:
Unitronic - Corporate Logo
ES#:
4465415
Mfg#:
C8-4.0T
In Stock
ON SALE!
Starting at $1450.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

JB4 OBDII Cable - 2 Position (Cable Only)

ES#4714891 - JB4-OBDII-CA - JB4 OBDII Cable - 2 Position (Cable Only) - Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. - Burger Motorsports - Audi BMW Volkswagen MINI

Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash.

Brand:
Burger Motorsports - Corporate Logo
ES#:
4714891
Mfg#:
JB4-OBDII-CA
In Stock
$25.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

HP Tuners PROLINK+ Cable

ES#4840618 - H021-002-06 - HP Tuners PROLINK+ Cable - Get access to even more vehicle data using PROLINK+ to wire in up to 2x analog signals and 1x CAN bus signal. Compatible with MPVI2+ and MPVI3 interfaces. - HP Tuners - Audi Volkswagen

Get access to even more vehicle data using PROLINK+ to wire in up to 2x analog signals and 1x CAN bus signal. Compatible with MPVI2+ and MPVI3 interfaces. For use with HP Tuners MPVI2+ and MPVI3 interfaces only.

Brand:
HP Tuners - Corporate Logo
ES#:
4840618
Mfg#:
H021-002-06
Ships in 7 Business Days
$60.99

This product was last offered at the strikethrough price on
05-12-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RaceChip XLR Throttle Controller With App Control

ES#4708643 - 999591 - RaceChip XLR Throttle Controller With App Control - Eliminate the delay in throttle response times with a simple XLR addition! Allows for Bluetooth connectivity for easy App based control. - Race Chip - Audi

Eliminate the delay in throttle response times with a simple XLR addition! Allows for Bluetooth connectivity for easy App based control.

Brand:
Race Chip - Corporate Logo
ES#:
4708643
Mfg#:
999591
Back Ordered
Auto Notify
$299.00 USD
Free Shipping
on orders $49 and up

JB4 OBDII Cable - With JB4 side Repair Harness

ES#4714892 - JB4-OBDII-CA-MC - JB4 OBDII Cable - With JB4 side Repair Harness - Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail. - Burger Motorsports - Audi BMW Volkswagen MINI

Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail.

Brand:
Burger Motorsports - Corporate Logo
ES#:
4714892
Mfg#:
JB4-OBDII-CA-MC
Ships on Sep 16, 2026
$30.00 USD
This product is lifetime replacement eligible Lifetime Replacement

APR ECU Upgrade - 4.0T EA825 V8 (RS6/RS7 Performance)

ES#4872176 - ECU40TEA825C8P - APR ECU Upgrade - 4.0T EA825 V8 (RS6/RS7 Performance) - Max gains of +112-210 AWHP and +145-225 AWFT-LBS depending on octane - APR - Audi

Max gains of +112-210 AWHP and +145-225 AWFT-LBS depending on octane Call In Or Chat For Best Price!
This upgrade must be performed at ECS Tuning's facility in Ohio. Vehicle must be brought to ECS Tuning for programming
For vehicles from the 2024 model year only.

Brand:
APR - Corporate Logo
ES#:
4872176
Mfg#:
ECU40TEA825C8P
In Stock
$2068.99 USD

APR Plus ECU Upgrade - 4.0T EA825 V8 (RS6/RS7 Performance)

ES#4872177 - ECU40TEA825C8PAP - APR Plus ECU Upgrade - 4.0T EA825 V8 (RS6/RS7 Performance) - Max gains of +124 AWHP and +142 AWFT-LBS and a Limited Powertrain Warranty - APR - Audi

Max gains of +124 AWHP and +142 AWFT-LBS and a Limited Powertrain Warranty Call In Or Chat For Best Price!

For vehicles from the 2024 model year only.

Brand:
APR - Corporate Logo
ES#:
4872177
Mfg#:
ECU40TEA825C8PAP
In Stock
$4999.99 USD

IE Stage 1 ECU Tune With POWERlink Cable

ES#5504045 - IESOWC11 - IE Stage 1 ECU Tune With POWERlink Cable - Stage 1 ECU tune that unlocks up to 828 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone. - Integrated Engineering - Audi

Stage 1 ECU tune that unlocks up to 828 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone. 2024 model years are equipped with a new ECU version and are not currently compatible. See notes for more information.

Brand:
Integrated Engineering - Corporate Logo
ES#:
5504045
Mfg#:
IESOWC11
In Stock
Starting at $179.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Pure900 ECU Tune With POWERlink Cable

ES#5504043 - IESOWC13 - IE Pure900 ECU Tune With POWERlink Cable - Pure900 hybrid turbo ECU tune that unlocks up to 903 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone. - Integrated Engineering - Audi

Pure900 hybrid turbo ECU tune that unlocks up to 903 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone. 2024 model years are equipped with a new ECU version and are not currently compatible. See notes for more information.

Brand:
Integrated Engineering - Corporate Logo
ES#:
5504043
Mfg#:
IESOWC13
In Stock
Starting at $179.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Burger Motorsports JB4 Tuner

ES#4620151 - JB4-EA825-40TT - Burger Motorsports JB4 Tuner - Plug & play tune with gains up to 120hp/130lb-ft. - Burger Motorsports - Audi

Plug & play tune with gains up to 120hp/130lb-ft.

Brand:
Burger Motorsports - Corporate Logo
ES#:
4620151
Mfg#:
JB4-EA825-40TT
Ships on Sep 16, 2026
$1199.00

This product was last offered at the strikethrough price on
05-21-2026

$879.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance ECU Software / Tuning

Add power and performance with special ECU software upgrades from recognized tuning leaders like APR, 034Motorsport, Unitronic, Integrated Engineering. Let our trained support staff show you how to pick the performance ECU software upgrade that suits your driving preferences and budget.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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