X4 reduced bulkhead. Features centering pins for simple create and constant geometry settings. The bulkheads feature a super low anti-roll club mounting spot allowing the anti-roll club wire become put straight in drive shafts to somewhat reduce the CG. The bulkheads function 1mm milled grooves the ball bearing hubs that relocated the bulkheads 1mm closer to the framework center line from each side. This bulkhead fits forward right part and backside left side. Made out of premium Swiss 7075 T6 aluminum, black colored anodized.