Aluminum front side diff bulkhead block dish raise the front differential height and improves the driveshaft angles, creating more traction on part exit while increasing mid corner rotation. The enhanced driveshaft positioning additionally helps to expand the service intervals of this driveshafts CV bones and pins, plus the diff outdrives. Machined from Swiss 7075 T6 aluminum and black coated. Fits both GTX and GTXE.