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 Up to 549HP and 495TQ

Up to 549HP and 495TQ

engineered and manufactured in house specifically for the SLS

Evolution performance exhaust systems sound very sporty and reflect the formidable nature of the powerful six-pot engine

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

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 Up to 549HP and 495TQR1 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