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S 550 BiTurbo 4-MATIC

RENNtech ECU+ Upgrade | C217 | S 550 Coupe | 540HP / 705TQ | 4.7L V8 BiTurbo | M278

ECU+ Upgrade | 540HP / 705LB-FT | Gains: +66HP / +139LB-FT

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RENNtech ECU Upgrade | C217 | S 550 Coupe | 500HP / 625TQ | 4.7L V8 BiTurbo | M278

ECU Upgrade | 500HP / 625LB-FT | Gains: +26HP / +59LB-FT

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