R1 Performance Package for SL500 | M113 | R129 | +23HP / +26LB-FT | MY 1999-2002 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 212 - E-Class Sedan and

212 - E-Class Sedan and Wagon

The TCU upgrade is designed to handle the increased power in a safe and efficient way

AMG GT63 Four Door Coupe (X290)

Gains: +40HP & 74LB-FT

Up to 670HP and 840 LB-FT  LB-FT

R1 Performance Package for SL500 | M113 | R129 | +23HP / +26LB-FT | MY 1999-2002 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 212 - E-Class Sedan andR1 Performance Package for M113 Powered R129 SL500 (MY 1999 2002). Includes ECU Upgrade and Carbon Fiber Air Box. Up to +23HP and +26LB FT The R1 performance package for the Mercedes 500 series engine includes our proprietary ECU upgrade in addition to our full carbon fiber airbox upgrade which offers a larger volume of incoming air for better engine breathing and improved cylinder filling. This combination that provides noticeable increases