The RockJock® 60VXR high pinion front crate axle is simply the strongest 60 series axle that we offer, designed for extreme off-road use with up to 40-inch tires and V8 conversion horsepower. The RockJock 60VXR is built to the legendary Currie Standard and loaded with exclusive features including a stronger reinforced stage-2 radius bottom center section, ring gear load bolt, large 3.5-inch axle tubes plus much more. If you seek out the most challenging routes and toughest obstacles to conquer then the RockJock 60VXR is the crate axle of choice. When purchased on the Web, a JK big brake master cylinder and booster upgrade are included to assure optimum brake performance.