RENNtech ECU Upgrade for C 350 | W203 | 290 HP / 278 LB-FT | MY2006-2007 mercedes-benz-s-class--222---2018-2020--s-65-amg-esr3393684 designed in-house by RENNtech and

designed in-house by RENNtech and manufactured in the USA

Our performance and sound pipes bypass the stock Mercedes resonators for increased exhaust gas flow

CLASS S LONG (W 221) 351 V6 4-Matic Blue Efficiency (HP: 306 | Year: 11 > )

773 HP +92 HP 778 LB-FT +42 LB-FT W/S 213 - AMG E63 R1 Package 793 HP +112 HP 788 LB-FT +52 LB-FT W/S 213 - AMG E63 R2 Package 803 HP +122 HP 818 LB-FT +82 LB-FT W/S 213 - AMG E63 R3 Package 875 HP +194 HP 871 LB-FT +135 LB-FT W/S 213 - AMG E63 R3+ Package 1

CLASS E (W 212) 550 4-matic [2 Filters Required] (HP: 408 | Year: 11 > )

RENNtech ECU Upgrade for C 350 | W203 | 290 HP / 278 LB-FT | MY2006-2007 mercedes-benz-s-class--222---2018-2020--s-65-amg-esr3393684 designed in-house by RENNtech andRENNtech ECU Upgrade for 203 C 350, up to 290HP, 278LB FT. Gains: +22HP & 20LB 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 software for