Molded composite LEFT steering block for 4mm King Pin. Complex product. Marked "L" for simple recognition. Composite steering block is redesigned to utilize the 4mm master pin axle, features redesigned Ackerman jobs for enhanced steering, which is molded from an original graphite composite item for minimal friction unlike the kingpin. The steering obstructs utilize ultra-precise wheel axles CNC-machined from premium HUDY Spring Steelââ? being furthermore hardened and hand ground for accuracy fitment. Usage with matching right steering block #372214.