Tuning your vehicle with APR Software has never been easier thanks to the APR Ultralink!
Call In Or Chat For Best Price! Only available for purchase in the United States and Canada.
Max gains of +191 AWHP and +163 AWFT-LBS and a Limited Powertrain Warranty
Call In Or Chat For Best Price! This upgrade must be performed at ECS Tuning's facility in Ohio.
Max gains of +191-268 AWHP and +163-262 AWFT-LBS depending on octane
Call In Or Chat For Best Price! This upgrade must be performed at ECS Tuning's facility in Ohio.
Stage 1 ECU tune that unlocks up to 828 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone.
2024 model years are equipped with a new ECU version and are not currently compatible. See notes for more information.
Pure900 hybrid turbo ECU tune that unlocks up to 903 horsepower for C8 Audi RS6, RS7, S8, SQ7, SQ8, and RSQ8 models directly from your smartphone.
2024 model years are equipped with a new ECU version and are not currently compatible. See notes for more information.
Say goodbye to your locked "401" bootloader thanks to Unitronic new TCU Unlock Tools which are seamlessly integrated with the UniCONNECT+ flashing application for end-users.
Get access to even more vehicle data using PROLINK+ to wire in up to 2x analog signals and 1x CAN bus signal. Compatible with MPVI2+ and MPVI3 interfaces.
For use with HP Tuners MPVI2+ and MPVI3 interfaces only.
Brand:
ES#:
4840618
Mfg#:
H021-002-06
In Stock
$60.99
This product was last offered at the strikethrough price on 05-12-2026
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail.
Brand:
ES#:
4714892
Mfg#:
JB4-OBDII-CA-MC
Ships on Sep 9, 2026
$30.00 USD
Lifetime Replacement
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All the performance ECU/TCU upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.
