RENNtech ECU Upgrade for GLK 350 (X204- 290 HP / 278 LB-FT) porsche-cayenne--9ya---2018-present--cayenne-gts-coupe--my2020---esr2231938 SL (R231) 350 V6 Blue

SL (R231) 350 V6 Blue Efficiency (HP: 306 | Year: 12 > )

Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

The maximum power number reached with the RENNtech ECU Plus Upgrade for the C205 - C 43 AMG Coupe is 416 HP and 460 LB-FT

Up to 413HP and 422  LB-FT

446 lb-ft @ 4

RENNtech ECU Upgrade for GLK 350 (X204- 290 HP / 278 LB-FT) porsche-cayenne--9ya---2018-present--cayenne-gts-coupe--my2020---esr2231938 SL (R231) 350 V6 BlueRENNtech ECU Upgrade for 204 GLK 350. Up to 290HP and 278LB FT. Gains: +22HP & 20LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning software