HPI Pro5 4 degree soft C-hub set
New from HPI Racing and made for the HB Pro5 touring car is a soft C-hub set. Coming as pairs and including kingpin bushings the steering knuckle carriers with four degree built-in castor are made from a softer composite material and they are designed to fine-tune the handling of the car in various track conditions.
Source: HPI Racing [hpiracing.com]