X4 reduced bulkhead. Feature centering pins for effortless assembly and constant geometry settings. The bulkheads feature a brilliant low anti-roll club mounting position that enables the anti-roll bar wire to be placed under the 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 part. This bulkhead fits front remaining side and rear right side. Made from premium Swiss 7075 T6 aluminum, black anodized.