RPM ECU-Upgrade | Porsche | Cayenne | Panamera | GTS + Turbo | EA825 | 4.0L V8 TwinTurboRENNtech Power Module (RPM) ECU tune increases horsepower and torque across the entire power band. By modifying ignition timing, throttle mapping, optimizing air to fuel ratios, and modifying boost mapping for turbo chargers of the twin turbocharged 4 liter V8 engine found in the Porsche Cayenne Turbo, Panamera Turbo, and Cayenne GTS. The RPM is contained in a CNC machined 6061 aluminum case with pre labeled wires and connectors. The RPM comes with a