R1 Performance Package | R230 | SL 500 | 325 HP / 365 LB-FT | 5.0L V8 NA | M113 mercedes-benz-clk-class--209---2004-2010--clk-350-esr3437914 The RENNtech 4-piece air box

The RENNtech 4-piece air box kit is made out of the highest quality pre-peg carbon fiber

218 - CLS 63 AMG BiTurbo FaceLift (2015+)

Porsche 911 991

The vast amount of increased torque across the entire RPM range gives the 550 an extra edge to compete with AMG powered vehicles

in order to improve your track setup/alignment

R1 Performance Package | R230 | SL 500 | 325 HP / 365 LB-FT | 5.0L V8 NA | M113 mercedes-benz-clk-class--209---2004-2010--clk-350-esr3437914 The RENNtech 4-piece air boxR1 Performance Package for 230 S 500. Includes ECU Upgrade and Carbon Fiber Air Box. Up to 325HP and 365 LB 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 horsepower, torque and throttle