Roadsafe 4wd Diff Drop Kit for Isuzu DMAX 2020-On - 10mm (30-50mm lift)Diff Drop Kit Isuzu DMAX 2020 Onwards 10mm Diff drop for Dmax (30 50mm lift) When lifting IFS vehicles, the Constant Velocity or CV joints are put on an increased angle. This increased angle of the CV joint during operation can accelerate the wear on the joint, as well as putting additional stress on the CV boots leading to splitting & eventually premature failure of the CV. This wear is accelerated further if larger wider wheels & tyres are fitted.