Mercedes-Benz AMG 43 Series | RENNtech Power Module | 411 HP / 442 LB-FT | M256 | 3.0L I6 Turbo EQ BoostRENNtech Power Module M256 AMG 43 3. 0L I6 Turbo EQ Boost Up to 411 HP 442LB FT Gains: +49 HP & +73 LB 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 +49 HP +73 LB FT in the Mercedes AMG 43 (M256) 3. 0l I6 Turbo EQ Boost engine, based on Dyno