Molded composite LEFT steering block for 4mm King Pin. Advanced product. Marked "L" for easy recognition. Composite steering block is redesigned to make use of the 4mm master pin axle, features redesigned Ackerman jobs for improved steering, which will be molded from a genuine 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. Use with matching right steering block #372214.