RENNtech HHT-Hand Held Tuner | ECU Upgrade | R199 | SLR McLaren | 675 HP / 646 LB-FT | M155 | 5.5L V8 Supercharged mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 332 LB-FT @ 2

332 LB-FT @ 2

W/S213 E-Class Sedan and Wagon E300 (Air Body Control Optional)

Audi RS4 (B7)

Purchase the optional Android OS tablet for our Digital Suspension Lowering Module here

CLASS E (W 211) 280 V6 [2 Filters Required] (HP: 231 | Year: 05 > 09)

RENNtech HHT-Hand Held Tuner | ECU Upgrade | R199 | SLR McLaren | 675 HP / 646 LB-FT | M155 | 5.5L V8 Supercharged mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 332 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.