RPM Bumper & Skid Plate Front HPI Baja 5B - 81972RPM Front Bumper & Skid Plate for HPI Baja 5B Quick Notes: Fits the HPI Baja 5B Replaces stock HPI 85420 A lack of front end protection of any R C vehicle eventually results in hours of down time, replacing expensive chassis components from front end impacts. The stock set up on the HPI Baja 5B has virtually no protection up front since the bumper is tucked so far into the front of the vehicle. RPM steps in with some serious protection in the form of