The diff bulkheads have been designed for extreme durability, while providing easy access for tuning and maintenance. Diff bulkheads are an important chassis component, housing both the front and rear differentials and providing mounting points for the suspension mounts and shock towers. To improve the consistency of the differential performance throughout each run, the gear box covers are milled out for extra air flow to help control diff temperatures. This prevents overheating the diff oils and ensures more consistent handling during long mains and extends intervals between rebuilds. Fits both GTX and GTXE.