RENNtech ECU+ Upgrade | W221 | S 63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-13 audi-tt-s--8j---2006-2014--esr8173231 This fully pre-preg carbon fiber

This fully pre-preg carbon fiber spoiler blends two distinct design elements to improve aero efficiency

CL (C216) 550 4-matic [2 Filters Required] (HP: 435 | Year: 10 > )

362 hp @ 5

718 Boxster GTS 2

The  RENNtech ECU Plus Upgrade brings the GLC 43 AMG SUV up to 416 HP and 460 LB-FT | Gains: +41 HP and +62 LB-FT

RENNtech ECU+ Upgrade | W221 | S 63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-13 audi-tt-s--8j---2006-2014--esr8173231 This fully pre-preg carbon fiberECU+ Upgrade Up to 669HP 734TQ Gains: +106 HP +140TQ 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. Programming takes only a few minutes and the vehicle can be