RENNtech | Stainless Steel Sport Mufflers without Electronic Valves | C63 /S AMG | C205 - Coupe | 4.0L BiTurbo V8 | M177 mercedes-benz-e-class-sedan--212---2010-2013--e63-amg-biturbo--2012-2013--esr4033562 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Upgrade the R172 - SLC 43 AMG gains up to +41 HP and +62 LB-FT

Our proprietary ECU+ upgrade for the Mercedes M157 Biturbo 4-MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

Rated by RENNtech:               500 HP @ 5

For custom options please call one of our Sales-Member: +1 (561) 845 - 7888

The EVM will ONLY revert to factory setting by pressing Button 2

RENNtech | Stainless Steel Sport Mufflers without Electronic Valves | C63 /S AMG | C205 - Coupe | 4.0L BiTurbo V8 | M177 mercedes-benz-e-class-sedan--212---2010-2013--e63-amg-biturbo--2012-2013--esr4033562 With the proprietary RENNtech ECURENNtech Stainless Steel Sport Mufflers without Electronic Valves for the C205 C63 AMG Coupe BiTurbo. Gains: up to 10 HP & 15 TQ. RENNtech Sport Mufflers are made out of T 304 stainless steel (SS) and 100% hand crafted in the USA. This exhaust system is rigorously tested to remove any unwanted resonances in the cabin to deliver a deep sound that keeps with the character of a luxury performance vehicle. Our mufflers with 2 3 4 inch diameter tubing