RENNtech Intermediate ECU Upgrade | X166 | GL63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 bentley-bentayga-speed--2019-present--6-0l-twinturbo-w12-esr6746698 Drive longer between cool-down periods
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
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RENNtech Intermediate ECU Upgrade | X166 | GL63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 bentley-bentayga-speed--2019-present--6-0l-twinturbo-w12-esr6746698 Drive longer between cool-down periodsIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +64HP & +72LB FT RENNtech M157 Biturbo ECU+ Upgrades are TV approved! 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. Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town
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