Audi S4 B5 2000-2002 2.7T 250HP
ECU Tuning Software
Unitronic Audi S4 B5 ECU Tuning Software is the most powerful ECU Tuning Software available for your Audi. Offering the biggest power gains in the industry with smooth and reliable performance, Unitronic engine tuning software will bring new life to your Audi S4 B5!
UNITRONIC STAGE 1
UNITRONIC STAGE 1 : 315HP / 345LB-TQ
Description: Performance Software Precisely Engineered to Run 16psi of Boost on a Completely Stock Audi S4 B5.
Gas Type: Optimized for 91 Octane / 95 Ron gas
Installation: Flashed directly through the (OBDII) Diagnostic port of your Audi (10-15 minutes).
Flash time is an approximation and may vary in some cases.
Required Hardware: None
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Audi Factory Safety Limiters Retained
- Greatest Power and Torque Gains in the Industry, Guaranteed!
- Optimized Responsiveness and Drivability
- Optimized Smoothness and Driving Comfort
- Power Delivery Perfectly Optimized Throughout the Power Band
- Improved Fuel Efficiency
- Speed Governor Removed
- RPM Limiter Increased to 7000
- Cold Weather Start and Warm up Improved
- Lower End Hesitation (Lag) Removed
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
550 $ (CAD)
UNITRONIC STAGE 1+
UNITRONIC STAGE 1+ : 320HP / 355LB-TQ
Description: Performance Software Precisely Engineered to Run 18psi of Boost on a Completely Stock Audi S4 B5.
Gas Type: Optimized for 93 Octane / 98 Ron gas
Installation: Flashed directly through the (OBDII) Diagnostic port of your Audi (10-15 minutes).
Flash time is an approximation and may vary in some cases.
Required Hardware: None
Recommended Hardware:
- Upgraded (DV) Diverter Valve
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Audi Factory Safety Limiters Retained
- Greatest Power and Torque Gains in the Industry, Guaranteed!
- Optimized Responsiveness and Drivability
- Optimized Smoothness and Driving Comfort
- Power Delivery Perfectly Optimized Throughout the Power Band
- Improved Fuel Efficiency
- Speed Governor Removed
- RPM Limiter Increased to 7000
- Cold Weather Start and Warm up Improved
- Lower End Hesitation (Lag) Removed
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
600 $ (CAD)
Unitronic Products are fully optimized to take advantage of the recommended fuel type. Using a lower grade fuel will result in the ECU self-adapting, hence reducing the performance output. The ECU adaptation technology has been extensively re-engineered by Unitronic and taken to a whole new level. This allows you to use your local grade of fuel and still benefit from the optimal performance and reliability.
UNITRONIC STAGE 2
UNITRONIC STAGE 2: 330HP / 366LB-TQ
Description: Performance Software Precisely Engineered to Run 20psi of Boost with a Upgraded Exhaust System.
Gas Type: Optimized for 93 Octane / 98 Ron gas
Installation: Flashed directly through the (OBDII) Diagnostic port of your Audi (10-15 minutes).
Flash time is an approximation and may vary in some cases.
Required Hardware:
- Turbo Back Exhaust System
- Cold Air Intake / Short Ram
Recommended Hardware:
- Upgraded (DV) Diverter Valve
- Upgraded Intercooler
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Audi Factory Safety Limiters Retained
- Greatest Power and Torque Gains in the Industry, Guaranteed!
- Optimized Responsiveness and Drivability
- Optimized Smoothness and Driving Comfort
- Power Delivery Perfectly Optimized Throughout the Power Band
- Improved Fuel Efficiency
- Speed Governor Removed
- RPM Limiter Increased to 7000
- Cold Weather Start and Warm up Improved
- Lower End Hesitation (Lag) Removed
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
- Precisely Calibrated for an Upgraded Exhaust System (Go Green - Use a Catalytic Converter)
- Optimized for a High Flow Catalytic Converter
650 $ (CAD)
Unitronic Products are fully optimized to take advantage of the recommended fuel type. Using a lower grade fuel will result in the ECU self-adapting, hence reducing the performance output. The ECU adaptation technology has been extensively re-engineered by Unitronic and taken to a whole new level. This allows you to use your local grade of fuel and still benefit from the optimal performance and reliability.
UNITRONIC STAGE 2+
UNITRONIC STAGE 2+: 345HP / 385LB-TQ
Description: Performance Software Precisely Engineered to Run 16psi of Boost with a K04 Setup on stock fueling.
Gas Type: Optimized for 93 Octane / 98 Ron gas
Installation: Flashed directly through the (OBDII) Diagnostic port of your Audi (10-15 minutes).
Flash time is an approximation and may vary in some cases.
Required Hardware:
- RS4-K04's
- OEM Fuel Injectors
- OEM Maf
- Turbo Back Exhaust System
- Cold Air Intake / Short Ram
Recommended Hardware:
- Upgraded (DV) Diverter Valve
- Upgraded Intercoolers
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Audi Factory Safety Limiters Retained
- Greatest Power and Torque Gains in the Industry, Guaranteed!
- Optimized Responsiveness and Drivability
- Optimized Smoothness and Driving Comfort
- Power Delivery Perfectly Optimized Throughout the Power Band
- Improved Fuel Efficiency
- Speed Governor Removed
- RPM Limiter Increased to 7000
- Cold Weather Start and Warm up Improved
- Lower End Hesitation (Lag) Removed
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
- Precisely Calibrated for an Upgraded Exhaust System (Go Green - Use a Catalytic Converter)
- Optimized for a High Flow Catalytic Converter
700 $ (CAD)
UNITRONIC STAGE 3 BT 440CC
UNITRONIC BT 440CC: Up to 475HP
Description: Big Turbo Software Precisely Engineered to Run 22psi of Boost on a Stock Engine.
Gas Type Options: 91 Octane - 93 Octane
Installation: Ecu needs to be sent to the Head Office. The turnaround time is approximately 1-2 business days from the receiving date. Please follow the Unitronic Shipping Form
In some rare cases we may require a little more time. In any event we will keep you informed once we receive your ECU.
Turbo Options: RS4-K04's
Required Hardware:
- Bosch 440cc Injectors
- RS4 or 85mm Hitachi Maf Housing (Keep your stock sensor)
- 4 Bar FPR
- Upgraded Exhaust System
- Intercooler System
- Cold Air Intake / Short Ram
Recommended Hardware:
- RS4 Inlet Pipe
- Upgraded (DV) Diverter Valve
Cam File Options: Stock Cams Only
Throttle Body File Options: Stock Throttle Body Only
Deleted Emissions Option: NO
Mafless Option: NO
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Optimized Responsiveness and Drivability
- Power Delivery Perfectly Optimized Throughout the Power Band
- Speed Governor Removed
- RPM Limiter Increased to 7200 (With Stock Head)
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
890 $ (CAD)
UNITRONIC STAGE 3 BT 630CC
UNITRONIC BT 630CC: Up to 650HP
Description: Big Turbo Software Precisely Engineered to Run 22psi of Boost on a Stock Engine. (For over 550HP you need upgraded rods)
Gas Type Options: 91 Octane - 93 Octane
Installation: Ecu needs to be sent to the Head Office. The turnaround time is approximately 1-2 business days from the receiving date. Please follow the Unitronic Shipping Form
In some rare cases we may require a little more time. In any event we will keep you informed once we receive your ECU.
Turbo Options: RS6-K04's - GT25 - GT28 Series Turbos or Similar Size
Required Hardware:
- Siemens 630cc Injectors
- RS4 or 85mm Hitachi Maf Housing (Keep your stock sensor)
- 4 Bar FPR
- Upgraded Exhaust System
- Intercooler System
- Cold Air Intake / Short Ram
Recommended Hardware:
- RS4 or Custom Inlet Pipes
- Upgraded (DV) Diverter Valve
- Upgraded Rods (For over 550HP)
Cam File Options: Stock Cams Only
Throttle Body File Options: Stock Throttle Body Only
Deleted Emissions Option: NO
Mafless Option: NO
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Optimized Responsiveness and Drivability
- Power Delivery Perfectly Optimized Throughout the Power Band
- Speed Governor Removed
- RPM Limiter Increased to 7200 (With Stock Head)
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
890 $ (CAD)
UNITRONIC STAGE 3 BT 870CC
UNITRONIC BT 870CC: More than 600HP
Description: Big Turbo Software Precisely Engineered to Run 22psi of Boost on a Built Engine.
Gas Type Options: 91 Octane - 93 Octane
Installation: Ecu needs to be sent to the Head Office. The turnaround time is approximately 1-2 business days from the receiving date. Please follow the Unitronic Shipping Form
In some rare cases we may require a little more time. In any event we will keep you informed once we receive your ECU.
Turbo Options: GT28-GT30 Series Turbo or Similar Size
Required Hardware:
- Siemens 870cc Injectors
- RS4 or 85mm Hitachi Maf Housing (Keep you stock sensor)
- 4 Bar FPR
- Built Engine
- Upgraded (DV) Diverter Valve
- Upgraded Exhaust System
- Intercooler System
- Custom "Y" Inlet Pipes
- Cold Air Intake / Short Ram
Cam File Options: Stock Cams Only
Throttle Body File Options: Stock Throttle Body Only
Deleted Emissions Option: NO
Mafless Option: NO
Features:
- Engineered with Strict Industry Standards
- Extensively Tested Under Various Driving Conditions
- Optimized Responsiveness and Drivability
- Power Delivery Perfectly Optimized Throughout the Power Band
- Speed Governor Removed
- RPM Limiter Increased to 7200 (With Stock Head)
- Optimized for an Upgraded (DV) Diverter Valve or (BOV) Blow Off Valve
- Ignition Timing Precisely Calibrated for Higher Octane Fuel
890 $ (CAD)
Upgrade pricing chart
| Stage 1 | Stage 1+ | Stage 2 | Stage 2+ | Stage 3 | |
|---|---|---|---|---|---|
| Stage 1 | 100 $ | 150 $ | 200 $ | 640 $ | |
| Stage 1+ | 100 $ | 150 $ | 640 $ | ||
| Stage 2 | 100 $ | 640 $ | |||
| Stage 2+ | 640 $ |
ALL UNITRONIC PERFOMANCE ECU TUNING SOFTWARE IS EXTENSIVELY TESTED BEFORE ITS OFFICIAL RELEASE!
Unitronic is here to provide you with the most precise power gains with the most pleasurable driving experience for your S4 B5. Unitronic is committed to offering you the most reliable performance flashes. Please be aware that results may vary and can be affected by gas quality, altitude and weather conditions. Power gains from our chip may also be different from car to car.
In addition, poor maintenance of your vehicle will affect your car’s software performance flash, so please make sure to maintain your vehicle. Further engine modification will allow you to take advantage of greater power gains, and unlock the true potential of your Unitronic ECU Performance Chip.
No changing of the chip or ECU is required with Unitronic ECU Upgrades. All products are installed by flashing your car’s ECU through the OBD port. The OEM chip is not touched.
Consult our product listing for more information on Unitronic ECU Engine Software.
GUARANTEE
All Unitronic performance software upgrades come with an unconditional 30-day money back guarantee, to ensure that your power and performance expectations are fully met. Our goal is to enhance your driving pleasure, and our risk free guarantee brings you peace of mind. If for any reason you are not 100% delighted with your Unitronic software, you may return it for a full refund (installation fees may not be covered). We are here to serve you and maintain our solid reputation, one satisfied customer at a time.
Unitronic ECU software upgrades are designed to offer your S4 B5 the highest level of performance and reliability. By offering a non-transferable lifetime limited warranty on our performance flashes, we are setting the standard for the ECU tuning industry.
This warranty does not cover any ECU parts, any mechanical issues or defective components not related to software installation. Unitronic reserves the right to refuse any warranty claim if problems arise from improper installation, misuse, or abuse of the chip. Unitronic reserves the right to inspect the ECU for evidence of tampering or misuse. If such is the case, Unitronic may decline the claim. If a manufacturer ECU update overwrites the Unitronic software, Unitronic and its dealers will happily reinstall it for you. In such a case, installation charges may apply and may vary between dealers.
For more information please visit our website or contact our Head Office at 1-866-341-2447. Unitronic reserves the right to refuse any refund claims if the request is judged to be inappropriate or dishonest.
ORDER YOUR ECU CHIP TODAY AND FEEL THE POWER YOU’VE ALWAYS WANTED!
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Testimonials
AL .:R aka velocity196 : I drive a 2006 MK4 gti 1.8t running the 830cc file with a GT3582R on water/meth. Simply amazing! Everyone Ive given a ride is amazed how much power this thing makes and how smooth the delivery is. Ive been daily driving the car on and off for about 6 months now. Off only because Ive either...
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