Audi B6 S4 4.2L V8 ECU Upgrade
APR is pleased to present the ultimate ECU Upgrade for the 4.2L V8 engine. After months of long nights and many hours of testing, development and more testing, we are pleased to offer you an ECU recalibration that is second to none. APR's extensive research and development provides you with a powerful ECU Upgrade with no loss of drivability or reliability. Expect increases in low-end torque, improved throttle response and a smoother, more powerful top end.
The APR 4.2L V8 ECU Upgrade is an expertly recalibrated engine control strategy that remaps the timing and air fuel ratios to provide smooth and reliable power as if intended by the OEM. APR's ECU Upgrade is developed to work within the OEM and Tier 1 Supplier specifications for engine component stress tolerances and performance specifications. APR's ECU Upgrades are available in octane specific versions to allow you to take full advantage of the fuel quality available in your area. APR's patented EMCS functionality puts the control of the engine's operation at your finger tips and allows for additional features and options to be installed to your OEM ECU.
|Year||Model||Engine||91 Octane Chipped||93 Octane Chipped||Price|
|*Speed and Rev Limt changes only.|
|2004-2005||S4||4.2||*||352hp / 312lb-ft||$599.00 SALE!
|Buy One Now|
All of the options below are included with purchase.
|¹Prices applicable to the North American market only.|
|²Due to many variations between ECU's some programs/options may unavailable.|
|For a total of 2 programs (i.e. - Stock and Chipped)¹ ²||$149¹ FREE!|
|For a total of 3 programs²||$219¹ FREE!|
|For a total of 4 programs²||$289¹ FREE!|
|¹Prices applicable to the North American market only.|
|²Due to many variations between ECU's some programs/options may be unavailable.|
|Security Lockout²||$59¹ FREE!|
|Fault Code Erase/Throttle Body Alignment (FCE/TBA)²||$59¹ FREE!|
|Anti-Theft System²||$199¹ FREE!|
EMCS is APR's revolutionary patented Enhanced Modular Chipping System. EMCS is an industry leading technology that brings many new features to the automotive enthusiast. This technology was developed exclusively by Audi Performance & Racing, LLC and demonstrates APR's continued commitment to lead the industry with the most technologically advanced products available.
Want chipped mode? Want to be able to switch back to your stock settings? Want a race mode to run 100 octane fuel at the track? How about a valet mode that limits power? EMCS is the lone technology on the market that can give you all of these options. No changing of the chip or ECU is required. These programs are available at the touch of a button.
Other companies have attempted to imitate EMCS with clumsy external switching devices that only replace portions of a "base" calibration. EMCS is still the only Bosch Motronic Engine Management System enhancement that gives the ECU the ability to completely rewrite the entire operating map data when selecting different programming options. This allows for completely new and independent calibrations for each program selected giving you the best, most powerful and complete Stock Modes, 91, 93 and 100 octane Performance Modes and Valet Modes.
APR's EMCS features and program modes are activated via your OEM cruise control buttons for ease of use and stealth. Your cruise control will continue to function as normal, but will give you the ability to scroll through the programs you have purchased with your APR ECU Upgrade. The procedure is simple and involves only two steps.
How EMCS Works
Press and hold the "set" button on your cruise control. After approximately five seconds, the "check engine" light on your dash will begin to blink once per second. This will tell you that you are activating program one. This blinking sequence will continue for approximately five seconds.
After this five second interval, the "check engine" light will begin blinking twice per second. This will indicate that you have activated the second program. This process is continued to access any remaining programs you may have purchased. (three blinks = program three, four blinks = program four).
Once you have activated the desired program, simply release the "set" button. The "check engine" light will stop flashing. Turn the ignition key off for 10 seconds, turn the key back on, and you will be locked in that program until you change it again.
It's that simple.
APR's EMCS is a truly modular system that allows for future enhancements and features to be added as they are developed without the need for additional hardware. EMCS makes the following advanced features possible:
APR's ECU Upgrade is able to be installed by APR's professional dealer network or by APR directly. Some applications are available to be installed via DirectPort programming without removing your ECU or even opening the hood. Some ECUs must be removed from the vehicle for DirectPort Programming. DirectPort Programming is not available for all late 1990 / early 2000 models and in these rare cases EMCS Modules are able to be soldered to the ECU. In the event there is not an APR dealer near, you also have the option to remove your ECU and send it to APR Headquarters for installation.
DirectPort Programming is another industry first brought to you by APR. DirectPort Programming is also referred to as "flashing" the ECU with the new operating software contained in APR's ECU Upgrade. No more soldering additional hardware to expensive and delicate factory electronics. DirectPort Programming facilitates ease of installation and offers new features to give you even more flexibility with your OEM ECU. DirectPort Programming is only available by bringing your car to an APR dealer or by mailing your ECU to APR directly.
EMCS Modules are still available for most ECU Upgrade installations. EMCS Modules are required for some older model ECU Upgrade installations where DirectPort Programming is not available. Clients may choose to have an EMCS Module installed over DPP if there is not an APR dealer close by or if the ECU's OEM memory module is too small to accept all EMCS options via DPP.
All APR ECU Upgrades installed via Directport Programming are eligible for a 6 hour free trial. This means you can experience the performance of the APR ECU Upgrade for your vehicle at no cost to you for 6 hours of driving time! To receive a free trial, please inquire with your APR Dealer of choice.
How to Purchase
APR provides two easy and painless methods to purchase your ECU Upgrade. You may visit any APR Dealer for local installation while you wait or you can remove your ECU and send it directly to APR Headquarters for installation. Typically your ECU is returned the same day we receive it. For ECU removal instructions see our Customer Support page.
If you're sending your ECU in to us, please print out and complete the order form below. Be sure to indicate which programs you would like to purchase, as well as the other information requested. For information on the program options, see above under the EMCS heading.
Security, Warranty and Money Back Guarantee
All APR ECU Upgrades are fully encrypted to prevent theft of our valuable and proprietary coding information by lesser companies.
All APR ECU Upgrades include a limited lifetime warranty against defects in the software and to provide free updates and reflashes as they become available. Installation may be additional and is not included in the warranty.
All APR ECU Upgrades offer a 30 day money back guarantee with no questions asked. If for any reason you are unhappy with your APR ECU Upgrade you may return the upgrade to your place of purchase for a full refund provided you are within a 30 day period from your time of initial purchase. Installation is not included in the guarantee and is at the discretion of the place of install.