APR ECU Upgrade S8 (D4/D4.5)

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APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 4.0T engine. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR’s optimization of the factory engine management system to take full advantage of the engine’s capabilities, without needing any end user adjustment. The software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!


  • $1999.99
Qty:  
  • SKU
    APRS8ECU

APR Stage I ECU Upgrade

The APR Stage I ECU Upgrade requires no hardware modifications and is available with 646-692 HP and 656-713 FT-LBS of torque, depending on octane. Gains as high at +121-171 HP and +134-191 FT-LBS of torque are available throughout the power band!

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APR Stage II ECU Upgrade

The APR Stage II ECU Upgrade requires a high flow Race DP exhaust system and is available with 672-710 HP and 691-751 FT-LBS torque, depending on octane. Gains as high as +147-199 HP and +168-228 FT-LBS of torque are available throughout the power band! This software must be used with a high flow Race DP exhaust system.

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NOTICE: THIS MOTORSPORT/RACING PRODUCT IS NOT DESIGNED TO MEET ANY FEDERAL EMISSIONS STANDARDS IN THE USA AND IS NOT FOR STREET OR HIGHWAY USE. THIS PRODUCT IS NOT C.A.R.B. COMPLIANT AND IS NOT FOR SALE OR USE IN CALIFORNIA, USA. APR MAKES NO CLAIMS THIS PRODUCT COMPLIES WITH ANY EMISSION LAWS IN ANY JURISDICTION. IT IS ENTIRELY THE RESPONSIBILITY OF THE PURCHASER TO INFORM THEMSELVES OF ANY LAWS OR REGULATIONS WHICH MAY PROHIBIT USE OF THIS PRODUCT.

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