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

What is included in the R2 package:

Engineered to utilize OEM lug bolts for most applications

ECU+ Upgrade | 540HP / 705LB-FT | Gains: +66HP / +139LB-FT

Dyno measured by RENNtech (peak):               681 HP @ 6

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