RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 mercedes-benz-sl-class--230---2003-2006--sl-600-esr2548062 RENNtech exhaust products are ceramic

RENNtech exhaust products are ceramic coated to reduce heat in the engine compartment as well as combat against thermal stress

Gains: +10HP & 26LB-FT

773 HP +92 HP 778 LB-FT +42 LB-FT X290 - AMG GT63 R1 Package 783 HP +102 HP 788 LB-FT +52 LB-FT X290 - AMG GT63 R2 Package 793 HP +112 HP 788 LB-FT +52 LB-FT X290 - AMG GT63 R3 Package 875 HP +194 HP 871 LB-FT +135 LB-FT X290 - AMG GT63 R3+ Package 1

No need for a coaster

X 6 (E71-E72) 35 i xDrive (HP: 306 | Year: 08 >)

RENNtech ECU Upgrade for SLK 350 | R171 | 290 HP / 278 LB-FT | MY2005-2011 mercedes-benz-sl-class--230---2003-2006--sl-600-esr2548062 RENNtech exhaust products are ceramicRENNtech ECU Upgrade for R171 SLK 350. Up to 290HP and 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