IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8

IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8

Marsoni

M251S

$749.50

Get it in 3 business days with 1 day shipping. Friday, May 29

IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8LEADING FEATURES Innovative mobile tuning for an easy install Thrilling power and acceleration gains 91, 93, 104, E40, & E85 fuel maps included Supports stock and upgraded hardware Pure 900 Hybrid Turbo support for massive power Unlocks many advanced tuning features Shielded by iE AutoProtect Apple & Android phones supported Take control of your Audi C8 4. 0TT by unlocking thrilling power and acceleration from your phone! Our cutting edge engine and

Easy Shipping

Quick Dispatch:

Your IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8 orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8 ships.

Need Help?
Questions about IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8 in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

Don’t get me wrong it’s not a horrible product but these wires have an extreme amount of resistance to them, and once they get hot they drop voltage drastically. It was nice it came with a bunch of eyelets and made it easy to assemble but unfortunately once they were over 100F temp (live in Florida so cars get way hotter than that on the inside) the voltage would go from a normal 12.5-13.5v all the way down to 8v. Partially my fault I did not notice they were CCA wire instead description, would not recommend for automotive use.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on June 25, 2025

Verified Purchase

Freddy

San Leandro, US

★★★★★ 5

Good price works great

Great product

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 21, 2026

Verified Purchase

Chris Crittenden

West Palm Beach, US

★★★★★ 5

Amplifier

Works good

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 29, 2026

Verified Purchase

Shawn

Massapequa, US

★★★★★ 1

Low quality. Recommend something from a better brand.

Low quality. Seemed fine until the first one I ordered one of the terminals broke off with very little tightening force. The replacement i had ordered worked for a few days then quit working altogether. Overall disappointed.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 8, 2026

Verified Purchase

Ailyn

Massapequa, US

★★★★★ 5

Bueno

Lo recomiendo

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 21, 2026