RENNtech ECU Upgrade for CL 65 (C216- 670 HP / 840 LB-FT) mercedes-benz-e-class-sedan--211---2003-2009--e-550-esr2239650 Designed in the U

Designed in the U

CLASS S LONG (V 220) 320 V6 [2 Filters Required] (HP: 224 | Year: 98 > 02)

Gains: +7HP & +28LB-FT

469 HP @ 6

R1 Performance Package for Mercedes-AMG E63: ECU Upgrade (HHT)

RENNtech ECU Upgrade for CL 65 (C216- 670 HP / 840 LB-FT) mercedes-benz-e-class-sedan--211---2003-2009--e-550-esr2239650 Designed in the URENNtech ECU Upgrade for 216 CL 65 AMG. Up to 670HP and 840 LB FT. Gains: +49HP & +102 LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning