Superior Material Quality: Constructed from forged and heat-treated steel, this 3-Piece Spindle Kit offers maximum strength and durability, outperforming the original design in terms of robustness. OEM Precision and Compatibility: Designed as a direct replacement for factory G body spindles, this kit maintains precision OEM geometry with an 8-degree pin inclination, ensuring a perfect fit and optimal performance. IMCA Certification: Fully approved for IMCA sanctioned events, this spindle kit is ideal for a range of racing classes including Hobby Stock, Stock Car, Modified, and both Northern & Southern Sport Mods. Convenient Three-Piece Design: The unique three-piece construction allows for quick and easy replacement of individual components, minimizing downtime and simplifying maintenance, especially useful in the event of a crash. Complete Kit with Essential Components: This comprehensive kit includes a left and right spindle, bolt-on steering arm, caliper bracket, and necessary hardware, making it a complete solution for upgrading or repairing GM Metric midsize vehicles. Kit Includes: (1) Speedway 3-Piece IMCA 1979-Up GM Metric Midsize Spindle Kit, Right. (1) Speedway 3-Piece IMCA 1979-Up GM Metric Midsize Spindle Kit, Left. Speedway 3-Piece IMCA 1979-Up GM Metric Midsize Spindle Kit Speedway Motors is proud to introduce our exclusive 3-piece 1979-Up GM Metric midsize spindle. Our advanced engineering techniques allowed for the recreation of an OEM spec spindle in a newly forged, heat-treated steel design that is stronger than the original. The unique three-piece construction provides for fast, convenient and affordable replacement of individual components in the event of a crash. These spindles are IMCA/USMTS/USRA approved for use in competition. Kit includes spindle, bolt-on steering arm (that is tapered to accept a Metric GM style tie rod end or the adapter stud 916-36055-GM, caliper bracket and necessary hardware. Assembly is required. Works great with our 1979-Up GM Metric Front Brake Rotors, bearings, calipers, etc. Forged, heat-treated steel. Precision OEM geometry. Direct replacement for factory spindle. Approved for use in IMCA sanctioned events. Three-piece design for quick, easy replacement. Replacement parts available separately. Mounting Bolt Center to Center: 5.45" Outer Bearing Surface O.D.: 0.843" Inner Bearing Surface O.D.: 1.25" Seal Friction Surface O.D.: 2"