RENNtech ECU Upgrade Z4 35iS E89 (2008-2012 N54B30to) mercedes-benz-e-class-sedan--210---1996-2002--e-320-esr2744801 +10 HP & +10 TQ

+10 HP & +10 TQ

C217 - S63 AMG Coupe | MY2018+

The RENNtech Track Series is a fully forged wheel derived from RENNtech’s extensive motorsports background and engineering expertise

RENNtech Smart Car ECU Upgrade

RENNtech ECU Upgrade Z4 35iS E89 (2008-2012 N54B30to) mercedes-benz-e-class-sedan--210---1996-2002--e-320-esr2744801 +10 HP & +10 TQRENNtech ECU Upgrade Z4 35iS E89 (2008 2012 N54B30to). Up to 420 HP + 435 TQ. Gains: +100 HP & +103 LB FT Our proprietary BMW ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our proprietary