The Challenger, Charger and 300 are no strangers to massive power output. Even more humble models work their differential bushings hard as the car is no lightweight, add in the huge power of the SRT and Hellcat models and you have a recipe for fast-wearing differential bushings that compromise performance and traction. SuperPro's SPF5166Kdifferential to subframe mount bushing kit (rearward mounting points on the differential) offer a far more solid and robust mounting of the rear differential to increase rear traction, reduce noise and impacts in the cabin as the differential's movement under changing loads is far better controlled - and the kit offers a huge improvement in service life; backed by a lifetime warranty. For maximum performance look at our SPF5165K differential-to-subframe mount bushing kit and our SPF5191K rear differential pinion mount bushing kit