Traxxas 9181-GRAY Outer Driveline & Suspension EHD Gray Upgrade Kit 2WD Raptor, Slash, Slash ModTraxxas 9181 GRAY 2WD Extreme Heavy Duty Upgrade Kit The Extreme Heavy Duty Upgrade Kit transforms your already tough 2WD Slash or 2WD Raptor into the ultimate bashing machine. Engineered for brushless power systems, the kit includes a full complement of driveline and suspension parts designed to work together as a complete package. Whether you're sending it at the skate park or preparing for a speed run, the Extreme Heavy Duty Upgrade Kit is battle