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GLS 550 BiTurbo

RENNtech ECU+ Upgrade | X166 | GLS 550 | 540HP / 705TQ | 4.7L V8 BiTurbo | M278

ECU+ Upgrade | 540HP / 705LB-FT | Gains: +66HP / +167LB-FT

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RENNtech ECU Upgrade | X166 | GLS 550 | 500HP / 605TQ | 4.7L V8 BiTurbo | M278

ECU Upgrade | 500HP / 605LB-FT | Gains: +26HP / +67LB-FT

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