Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Marsoni

M251S

$680.00

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

Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSIThese software upgrades are entirely compatible with the UniCONNECT+ cable, Which allows you to tune your vehicles directly through the OBD 2 port within minutes, from the comfort of your own home. Features Optimized Responsiveness, Smoothness, Drivability, and Comfort Unitronics ECU calibrations are engineered to improve engine response and reduce low end lag. Unitronics Performance Software has gained worldwide recognition and is well known for its

Easy Shipping

Quick Dispatch:

Your Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI 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 Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI ships.

Need Help?
Questions about Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI, 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 Unitronic Stage 1 ECU Performance Tune C8 RS6 / RS7 4.0TFSI 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

Set screws are poor quality and are sometimes powdercoated on the exposed threads. Leads to striped hex sockets and inability to tighten properly. Durable finish as evidenced by no visible damage after throwing parts across the shop in frustration. Ended up running self tapping screws thru parts to complete assembly.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 26, 2024

Verified Purchase

Carl L. Bradley

Lexington, US

★★★★★ 1

Kinda flimsy…

Thought the assembly was metal, it’s some kind of PVC.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on September 22, 2025

Verified Purchase

Carlos C.