R1 Performance Package | R230 | SL 550 | 413 HP / 422 LB-FT | 5.5L NA V8 | M273 mercedes-benz-clk-class--209---2004-2010--clk-63-amg-esr9002317 the R1 package comes with

the R1 package comes with our stainless steel downpipes with 200 cell sport catalytic converters

Turbo Upgrade with lightweight forged billet turbo wheel features a dramatically larger-than stock impeller (inlet side) and an increase in the turbine trim (exhaust side)

Used together

Whether your AMG GT is equipped with iron or carbon ceramic rotors

Maserati Levante Modena (M161) 2017+

R1 Performance Package | R230 | SL 550 | 413 HP / 422 LB-FT | 5.5L NA V8 | M273 mercedes-benz-clk-class--209---2004-2010--clk-63-amg-esr9002317 the R1 package comes withR1 Performance Package for 221 S 550. Includes ECU Upgrade and Stainless Steel Header. Up to 413HP and 422 LB FT. Gains: +31HP & +31LB FT The R1 performance package for the Mercedes 550 includes our proprietary ECU upgrade in addition to our stainless steel shorty headers designed specifically for the 550 V8 for a combination that provides increased performance, sound and throttle response across the vehicles entire powerband. R1 performance package