X4 paid off bulkhead. Feature centering pins for simple make and constant geometry settings. The bulkheads function an excellent low anti-roll club mounting place which allows the anti-roll club cable become placed straight in drive shafts to dramatically reduce the CG. The bulkheads function 1mm milled grooves the ball bearing hubs that relocated the bulkheads 1mm nearer towards the framework center line from each component. This bulkhead fits front side left part and rear right part. Created from premium Swiss 7075 T6 aluminum, black anodized.