X4 high quality lower bulkhead. Improves durability in hard crashes. Features centering pins for simple set up and constant geometry settings. The bulkheads feature a brilliant low anti-roll bar mounting place that enables the anti-roll bar wire to be placed under the drive shafts to somewhat lower the CG. The bulkheads feature 1mm milled grooves the ball bearing hubs that relocated the bulkheads 1mm nearer to the chassis center line from each part. This bulkhead fits front left part and rear right side. Created from premium Swiss 7075 T6 aluminum, black anodized.