Mercedes-AMG SL 55 | RPM ECU-Upgrade | R232 | 4.0 L BiTurbo | 579 HP | 664 LB-FTRENNtech Power Module ECU Upgrade for Mercedes AMG SL 55 R232 4. 0 L BiTurbo w EQ Boost M177 579 HP & 664LB FT RENNtech 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 of the 4. 0 liter BiTurbo V8 engine (M177) found in the Mercedes AMG SL series of vehicles. The RPM is contained in a CNC machined 6061 aluminum case with pre labeled
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Mercedes-AMG SL 55 | RPM ECU-Upgrade | R232 | 4.0 L BiTurbo | 579 HP | 664 LB-FT