RENNtech ECU Upgrade E 350 MY 2014+ (W212- 308 HP / 285 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 Either you leave it to

Either you leave it to the car’s ECU to choose the noise level

The Hart like a Hammer Capsule is limited edition- once sold out

2020+ X167 GLS 580

552 HP @ 6100 RPM

0 at 5000 rpm   lb-ft 382

RENNtech ECU Upgrade E 350 MY 2014+ (W212- 308 HP / 285 LB-FT) porsche-boxster--981---2012-2016--boxster-gts-esr7596289 Either you leave it toRENNtech ECU Upgrade for 212 E 350 FaceLift (2014+). up to 308HP and 273 LB FT. Gains: +6HP & 12 LB 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.