RENNtech Porsche Cayenne Turbo S (2007-10) ECU Upgrade (575 HP / 612 LB-FT)RENNtech Porsche Cayenne Turbo S (2007 10) ECU Upgrade. Up to 575HP and 312LB FT. Gains: +25HP & +59LB FT The RENNtech Power Module (RPM) ECU tune delivers significant horsepower and torque gains across the entire power band. By modifying boost mapping and keeping optimized air to fuel ratios, the entire power and torque curve is shifted upward delivering +25 HP +59 LB FT in the Porsche Cayenne TurboS 4. 8 liter V8 Turbo engine, based on Dyno measured