R1 Performance Package | R171 | SLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-e-class-sedan--210---1996-2002--e-320-esr2744801 0L V12 BiTurbo) Modified Performance

0L V12 BiTurbo) Modified Performance (at crank):

Gains: up to +208HP | +153LB-FT

development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability

RENNtech Stainless Steel Downpipes with 200 Cell Sport Catalytic Converters for 222 - S 63 AMG Sedan and 217 - S 63 AMG Coupe Model Years 2018+

R1 Performance Package | R171 | SLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-e-class-sedan--210---1996-2002--e-320-esr2744801 0L V12 BiTurbo) Modified PerformanceR1 Performance Package for 171 SLK 55 AMG. Includes ECU Upgrade and Carbon Fiber Air Box. Up to 385HP and 400 LB FT. Gains: +30HP & +24LB FT The R1 performance package for the Mercedes 55 series engine includes our proprietary ECU upgrade in addition to our full carbon fiber airbox upgrade which offers a larger volume of incoming air for better engine breathing and improved cylinder filling. This combination that provides noticeable increases