Molded composite LEFT steering block for 4mm King Pin. Complex product. Marked "L" for easy recognition. Composite steering block is redesigned to utilize the 4mm master pin axle, features redesigned Ackerman jobs for improved steering, and it is molded from a unique graphite composite item for minimal friction unlike the kingpin. The steering obstructs utilize ultra-precise wheel axles CNC-machined from premium HUDY Spring Steelââ? that are furthermore hardened and hand ground for precision fitment. Use with matching right steering block #372214.