R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-ml-class--164---2006-2011--ml-350-bluetec-esr5895823 The RENNtech Sport Muffler System

The RENNtech Sport Muffler System for the C217 - S 550 AMG Coupe comes with an integrated valve system and utilizes the vacuum OEM actuators

Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish

+35 HP / +44 LB-FT

Note: Mercedes M256 engine performance when measured on the dyno obtains higher power numbers than rated from factory

RENNtech modifies the OEM Aluminum Lower Control Arms to allow for camber adjustment on lowered cars and cars with performance setup

R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-ml-class--164---2006-2011--ml-350-bluetec-esr5895823 The RENNtech Sport Muffler SystemR1 Performance Package for 209 CLK 55 AMG. Includes ECU Upgrade and Carbon Fiber Air Box. Up to 385HP and 400LB 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 horsepower, torque and throttle