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The R1 Pkg requires an additional core charge
RENNtech ECU HHT (HandHeldTuner) for the 204 - C 63 AMG Black Series
R3+: ECU Upgrade
RENNtech adjustable links for rear axle
but improves both vehicle handling and performance
RENNtech Porsche 997 Carrera S (3.8L DFI) ECU Upgrade (365 HP / 300 LB-FT) ferrari-california--2008-2017--esr8078893 The R1 Pkg requires anRENNtech Porsche 997 Carrera S (3. 8L DFI) ECU Upgrade. Up to 396HP and 320LB FT. Gains: +11HP & +10LB FT Our proprietary Porsche 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