The Challenger, Charger and 300 are no strangers to massive power output. Even more humble models work their subframe and 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 SPF5166Ksubframe mount bushing kit offers a far more solid and robust mounting of the rear subframe and suspension to increase rear traction, reduce noise and impacts in the cabin and effectively put all of your horsepower to the ground- 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 SPF5191Krear differential pinion mount bushing kit.