R2 Performance Package for CLK 63 (C209- 554 HP / 523 LB-FT) mercedes-benz-slk-class--172---2011-2020--slk-55-amg-esr4729687 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Tuning the Aston Martin DB11 V8 gains up to +85 HP and +89 LB-FT

All mounting hardware included

For extra convenience

The R1 performance package increases performance to 669 hp and 624 lb/ft without sacrificing daily driver comfort or reliability

R2 Performance Package for CLK 63 (C209- 554 HP / 523 LB-FT) mercedes-benz-slk-class--172---2011-2020--slk-55-amg-esr4729687 With the proprietary RENNtech ECUR2 Performance Package for 209 CLK 63 AMG. Includes ECU Upgrade and Carbon Fibre Air Box. Up to 554HP and 523LB FT. RENNtech performance package 2 includes our proprietary ECU tune in addition to our full carbon fiber airbox, 82mm throttle body kit and RENNtech stainless steel headers for a gain of +76 HP and +58 TQ over stock. Performance Package 2 Includes: RENNtech ECU Upgrade Full Carbon Fiber Airbox 82mm Throttle Body Kit Stainless Steel Headers