R1 Performance Package for S 550 (W221- 413 HP / 422 LB-FT) mercedes-benz-c-class--217---2014-2020--s63-amg-esr5011825 The Performance Series is the

The Performance Series is the culmination of this extensive knowledge

The RENNtech Sport Muffler System for the W205 - C 63 AMG Coupe is developed without the Electronic Valve System option

ECU reprogramming will be required

The RENNtech V3 Digital Lowering Module (DLM) is designed to work with for the Rolls Royce Suspensions

RENNtech HHT - Hand Held Tuner ECU Upgrade

R1 Performance Package for S 550 (W221- 413 HP / 422 LB-FT) mercedes-benz-c-class--217---2014-2020--s63-amg-esr5011825 The Performance Series is theR1 Performance Package for 221 S 550. Includes ECU Upgrade and Stainless Steel Header. Up to 413HP and 422 LB FT. Gains: +31HP & +31 LB FT The R1 performance package for the Mercedes 550 includes our proprietary ECU upgrade in addition to our stainless steel shorty headers designed specifically for the 550 V8 for a combination that provides increased performance, sound and throttle response across the vehicles entire powerband. R1 performance package