RENNtech HHT-Hand Held Tuner | ECU Upgrade | R199 | SLR McLaren | 675 HP / 646 LB-FT | M155 | 5.5L V8 Supercharged porsche-911--991-1---2011-2016--carrera-esr5903692 623 LB-FT @2

623 LB-FT @2

2018-2020 W220 S560

RENNtech brake lines increase breaking efficiency and remove the spongey feel under arduous conditions

Turbo E-Hybrid

CLK COUPE' (C 209) 350 [2 Filters Required] (HP: 272 | Year: 05 > 09)

RENNtech HHT-Hand Held Tuner | ECU Upgrade | R199 | SLR McLaren | 675 HP / 646 LB-FT | M155 | 5.5L V8 Supercharged porsche-911--991-1---2011-2016--carrera-esr5903692 623 LB-FT @2The RENNtech ECU Plus Upgrade brings the SLR McLaren up to 675 HP and 646 LB FT Gains: +47 HP and +25 LB FT. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU.