Aluminum front component diff bulkhead block dinner enhance the front side differential height and improves the driveshaft views, creating more traction on component exit while increasing mid part rotation. The improved driveshaft positioning also helps expand the solution periods of the driveshafts CV bones and pins, plus the diff outdrives. Machined from Swiss 7075 T6 aluminum and black colored coated. Fits both GTX and GTXE.