RENNtech Stage II Turbo Upgrade | M256 | 3.0L I6 Turbo EQ Boost | 540HP/515LB-FT | MY2018+ mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 RENNtech is proud to introduce

RENNtech is proud to introduce an all new rear decklid spoiler design for the Mercedes-Benz CLS Coupe

TCU Upgrade

621 HP @ 4800 RPM

You get to keep the adaptive damping features of your factory shock while improving the spring rate and gaining adjustability

All hose ends covered by black heatshrink

RENNtech Stage II Turbo Upgrade | M256 | 3.0L I6 Turbo EQ Boost | 540HP/515LB-FT | MY2018+ mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 RENNtech is proud to introduceIncludes Turbo Upgrade, and ECU Upgrade. Gains: Up to +104HP +105LB FT RENNtech Stage II Turbo upgrade for the AMG 53 M256 AMG 3. 0L Inline 6 engine. RENNtech has been at the forefront of ECU tuning for over 30 years. Through our experience, countless hours of in house Research & Development, and extensive testing we ensure that all RENNtech Performance upgrades offer incredible performance gains as well as rock solid reliability. The RENNtech Stage