McLaren 720S ECU Tune — Power Figures

Factory output for the McLaren 720S is 710 hp and 568 lb-ft (crank).Stock + RK-Tunes Tune raises it to 933 hp and 706 lb-ft, a gain of 223 hp and 138 lb-ft.High Flow Downpipe / Exhaust + RK-Tunes Tune raises it to 973 hp and 746 lb-ft, a gain of 263 hp and 178 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.