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Unitronic Performance Software - Flashed @ ECS

Choose the stage that meets your power goals!

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

ES#:: 4465107
Mfg#:: 4.2-5V

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Unitronic Performance Software - Flashed @ ECS

Starting at: $400.00

SALE: 400.00

Starting at: $400.00

WAS: $550.00 on 06-22-2026

This product was last offered at the strikethrough price on
06-22-2026

Sale Save 27%

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Availability:

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Est. Ship Date:

in 1 Business Day

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Unitronic Performance Software - Stage 1

Gain up to 22 horsepower and 20 lb-ft of torque on 91 Octane

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

4465104 4.2-5V-1

Availability:

In Stock

Est. Ship Date:

in 1 Business Day

Lifetime Replacement

Sale

SAVE 27% $550.00

This product was last offered at the strikethrough price on
06-22-2026

400.00

Unitronic Performance Software - Stage 1+

Gain up to 27 horsepower and 25 lb-ft of torque on 93 Octane

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

4465105 4.2-5V-1+

Availability:

In Stock

Est. Ship Date:

in 1 Business Day

Lifetime Replacement

Sale

SAVE 25% $600.00

This product was last offered at the strikethrough price on
06-22-2026

450.00

Unitronic Performance Software - Stage 2

Gain up to 35 horsepower and 53 lb-ft of torque on 93 Octane

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Requires an Upgraded Exhaust System

4465106 4.2-5V-2

Availability:

In Stock

Est. Ship Date:

in 1 Business Day

Lifetime Replacement

Sale

SAVE 23% $650.00

This product was last offered at the strikethrough price on
06-22-2026

500.00

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Special Care - VIN Confirmation

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

4376649 SPECIALCAREVIN

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

0.00

Included With Purchase

Product Details

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Features:

Engineered with Strict Industry Standards
Extensively Tested Under Various Driving Conditions
Factory Safety Limiters Retained
Optimized Responsiveness and Drivability
Optimized Smoothness and Driving Comfort
Power Delivery Perfectly Optimized Throughout the Power Band
Improved Fuel Efficiency
Speed Governor Removed
Lower End Hesitation (Lag) Removed

Stage 1+ Adds:

Ignition Timing Precisely Calibrated for Higher Octane Fuel

Stage 2 Adds:

Precisely Calibrated for an Upgraded Exhaust System
Optimized for a High Flow Catalytic Converter

Stage 2 Requires:

Upgraded Exhaust System

*This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next business day.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

This Part Fits the Following Vehicles

Make	Model	Submodel	Engine	Special Fitment Notes
Audi	B6 S4	All	V8	Use vehicle selector to confirm fitment
Audi	B7 S4	All	V8	Use vehicle selector to confirm fitment
Audi	C5 S6	Quattro	4.2	Use vehicle selector to confirm fitment
Audi	D2 S8	Quattro	D2 4.2L	Use vehicle selector to confirm fitment

*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.