RENNtech | ECU+ Upgrade | G550 | W463 | 523 HP / 583 LB-FT | 4.0L BiTurbo V8 | M176 | up to MY2018 porsche-panamera--971---2016-2024--turbo-s-e-hybrid-esr5686716 CLASS S (W 221) 350

CLASS S (W 221) 350 V6 Blue Efficiency (HP: 306 | Year: 11 > )

The RENNtech HPFP kit has been designed with an emphasis on reliability and performance

RENNtech ECU Upgrade for 211 - E 550

RENNtech | ECU+ Upgrade | G550 | W463 | 523 HP / 583 LB-FT | 4.0L BiTurbo V8 | M176 | up to MY2018 porsche-panamera--971---2016-2024--turbo-s-e-hybrid-esr5686716 CLASS S (W 221) 350ECU+ Upgrade 523HP 583TQ Gains: +102HP +128TQ RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed