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Engine, Engine, Fuel System, G 550 4x4² (2017-present), G 550 BiTurbo (2015-present), MY ( 99'-2018 ) W463, RENNtechRENNtech | High Pressure Fuel Pump Upgrade | M177 – 4.0L V8 BiTurbo
(0)High Pressure Fuel Pump Upgrade Kit M177 – Single Scroll
RENNtech | ECU+ Upgrade | G550 4×4² | W463 | 523 HP / 583 LB-FT | 4.0L BiTurbo V8 | M176
(0)ECU+ Upgrade | 523HP / 582TQ | Gains: +102HP / +128TQ
