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Unitronic Stage 3 ECU Performance Tune C8 RS6 / RS7 4.0TFSI
Unitronic Stage 3 ECU Performance Tune C8 RS6 / RS7 4.0TFSI
Unitronic Stage 3 ECU Performance Tune C8 RS6 / RS7 4.0TFSI
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Unitronic Stage 3 ECU Performance Tune C8 RS6 / RS7 4.0TFSI

Marsoni M251S
Sale price$1105.00
Pay 4 payments of $276.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Unitronic Stage 3 ECU Performance Tune C8 RS6 / RS7 4.0TFSIStage 3 ECU TCU Performance Software for the C8 RS6 and RS7 equipped with the 4. 0TFSI EA825 (DJPB) engine and TheTurboEngineers 1020 Hybrid Turbochargers. With testing and validations completed, power outputs are increased by up to +336HP +236LB FT with Unitronic Stage 3 (93octane 98ron) Performance Software for a maximum of 936HP 830LB FT when combined with Unitronic's Stage 3 AL952 TCU Performance Software for seamless operation. These software
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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
4.6 ★★★★★
Based on 1007 reviews
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B
Verified Purchase
Bob
Battle Creek, US
★★★★★ 5
Good Quality, Good Price for a Subaru Replacement Air Filter
Look like a great name brand filter. Not a bad price for a Subaru (2013) replacement. I will buy again if available.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
L
Verified Purchase
Lance Low
Lexington, US
★★★★★ 5
It works!
Fitment was great on my 2014 Subaru Crosstrek. Construction was solid and great that I don’t have to worry about changing it for 18,000 miles. Would purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
T
Verified Purchase
Thomas M. Cook
Dallas, US
★★★★★ 5
As described, great quality
Perfect fit and function for 2018 Subaru Outback
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
M
Verified Purchase
Michael Mueller
Dallas, US
★★★★★ 4
Good product
This is a long life filter without having to oil and wash like a lifetime k&n.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
C
Verified Purchase
Create58
Draper, US
★★★★★ 5
Fits great
Excellent value for the money and fits great. Does exactly what you need it to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026

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