80mm Fixed Supercharger Pulley

The VRP 80mm Fixed Supercharger Pulley is engineered for Mercedes-Benz AMG owners with the M113K 5.4L V8 Kompressor engine who seek to overcome the limitations of the stock clutched pulley. The factory system's electromagnetic clutch introduces a noticeable lag in power delivery and its heavy rotational inertia can make the engine feel sluggish. Additionally, the OEM clutched unit is prone to mechanical failures, leading to issues like belt slip and loss of boost pressure. This 80mm fixed pulley converts the supercharger to a direct-drive setup, discarding the heavy and failure-prone factory clutch. By reducing rotational mass by 35%, the M113K engine can spool up faster, resulting in significantly improved throttle response. The larger 80mm diameter increases the drive ratio, causing the supercharger to spin faster and produce higher boost levels throughout the RPM range. A specialized nitride coating on the pulley's surface enhances friction, ensuring reliable belt grip even under high heat and load conditions. This upgrade provides immediate torque delivery, with claims of over 70 WHP gains and improved mid-range power. The reduction in weight also lessens the load on the supercharger snout and crankshaft, potentially enhancing the long-term reliability of the M113K internals. The pulley features a robust construction with a high-grade nitride coating and a fixed design that eliminates the problematic bearings and springs found in OEM clutched pulleys. Technical Specifications: Fitment: 2003-2007 Mercedes-Benz AMG 55 Models (and G55 up to 2011) Engine Platform: M113K (5.4L V8 Kompressor) Factory Ratings: Approx. 469-493 HP / 516 lb-ft Torque Compatibility: Fits the following vehicles: 2003-2006 Mercedes-Benz E55 AMG, 2003-2006 Mercedes-Benz S55 AMG, 2003-2006 Mercedes-Benz CL55 AMG, 2003-2007 Mercedes-Benz SL55 AMG, 2006-2006 Mercedes-Benz CLS55 AMG, 2005-2011 Mercedes-Benz G55 AMG Kompressor.