R1 Performance Package | R171 | SLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 bmw-m4--f82-f83---2014-2020--3-0-liter-twin-turbocharged-inline-6-esr1854239 Designed and developed specifically for

Designed and developed specifically for the Mercedes-Benz S-Class

Air Filter and BOV Adapters are required to reach full power output level

Up to 530HP and 485LB-FT LB-FT

drivers can use the Sound Remote Controller or the new smartphone app (for iOS and Android) to regulate the valves

Up to 549HP and 495TQ

R1 Performance Package | R171 | SLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 bmw-m4--f82-f83---2014-2020--3-0-liter-twin-turbocharged-inline-6-esr1854239 Designed and developed specifically forR1 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