Molded composite LEFT steering block for 4mm King Pin. Complex material. Marked "L" for simple identification. Composite steering block is redesigned to utilize the 4mm master pin axle, features redesigned Ackerman positions for improved steering, and is molded from a unique graphite composite product for minimal friction contrary to the kingpin. The steering blocks utilize ultra-precise wheel axles CNC-machined from premium HUDY Spring Steelââ? which are in addition hardened and hand ground for accuracy fitment. Usage with matching right steering block #372214.