Mercedes-AMG GLS 63 (X167) ECU Tune — Power Figures

Factory output for the Mercedes-AMG GLS 63 (X167) is 603 hp and 627 lb-ft (crank).Stock + RK-Tunes Tune raises it to 670 hp and 705 lb-ft, a gain of 67 hp and 78 lb-ft.High Flow Downpipe / Exhaust + RK-Tunes Tune raises it to 695 hp and 730 lb-ft, a gain of 92 hp and 103 lb-ft.This tune is fulfilled by mail-in: you remove the ECU, ship it to us, and we flash it on the bench and return it.Figures are estimates at the crank; real-world results vary by vehicle condition, fuel and conditions.