Factory pins are often too short to accommodate these components, which can result in an unsafe or sloppy fit. UMI’s extended design solves this problem by offering the extra length needed while maintaining precise alignment. The locating pins ensure the leaf spring pack remains properly positioned on the axle pad, reducing the risk of movement under hard acceleration, braking, or cornering. This leads to a more secure installation, better traction, and improved confidence when pushing the vehicle on the street or track.. Each kit includes four pins, making it a complete solution for most rear suspensions. The use of premium 4140 CrMo steel provides excellent shear strength and resistance to deformation, ensuring long-lasting performance even in demanding conditions. Whether you are building a street car, drag car, or autocross machine, UMI’s leaf spring pin kit is a simple yet critical upgrade that helps maximize the effectiveness of your suspension system.. UMI's leaf spring pin kit includes (4) custom extended length 4140 CrMo locating pins. These pins provide a precision way to center the leaf spring when using lowering systems or pinion angle shims. Factory pins often don't have enough length to do the job. 100% Made in USA.. UMI’s leaf spring pin kit includes four extended 4140 CrMo pins to precisely center leaf springs with lowering blocks or pinion shims. Factory pins are often too short. 100% Made in USA for strength and reliability.. UMI Performance 15-24 Ford F-150 3/4in Extended Length Leaf Spring Pin Kit. 1/2"-20 thread. 4.25" total length. 0.850" Pin length. 3/4" Pin Diameter. Extended length head for use with pinion angle shims and lowering kits. UMI leaf spring pin kit with extended 4140 CrMo pins. Includes Grade 8 hardware. Tough black zinc coating. UMI Extended Pin Kit. Leaf Spring Pin Kit. 100% Made in USA

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