RENNtech Stage I Turbo Upgrade | M256 | 3.0L I6 Turbo EQ Boost | 505HP/460LB-FT | MY2018+ porsche-cayenne--2017-present--po536--340ps--esr7220361 Our proprietary ECU+ upgrade for

Our proprietary ECU+ upgrade for the Mercedes M157 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

):                745 HP @ 6

X166 - GL63 AMG

Rated by RENNtech:                 545 HP @ 6

and tested by RENNtech for improved track and street handling for the AMG GT -series

RENNtech Stage I Turbo Upgrade | M256 | 3.0L I6 Turbo EQ Boost | 505HP/460LB-FT | MY2018+ porsche-cayenne--2017-present--po536--340ps--esr7220361 Our proprietary ECU+ upgrade forIncludes Turbo Upgrade, and ECU Upgrade. Gains: Up to +69HP +50LB FT RENNtech Stage I Turbo upgrade for the AMG 53 M256 AMG 3. 0L Inline 6 engine. RENNtech has been at the forefront of ECU tuning for over 30 years. Through our experience, countless hours of in house Research & Development, and extensive testing we ensure that all RENNtech Performance upgrades offer incredible performance gains as well as rock solid reliability. The RENNtech Stage I