73-87 GM C10 Frame C-Notch Kit

The UMI Performance 73-87 GM C10 Frame C-Notch Kit is a bolt-on frame notching solution specifically designed for full-size General Motors trucks from 1973 through 1987. This kit is essential for serious suspension builders who are looking to install modern performance suspension geometry on classic C10 platforms. It enables the fitment of contemporary coilover systems and aggressive wheel sizes without the risk of frame-to-tire or frame-to-suspension contact.

Constructed from 3/16-inch thick steel notching plates, the kit features a black powder-coat finish that protects against corrosion while maintaining structural integrity during dynamic suspension work. The bolt-on design simplifies installation by eliminating the need for frame cutting or welding, although it does modify the frame's structure to accommodate the new suspension setup. The complete kit is designed to be ready for fitment without requiring additional fabrication.

This kit is ideal for frame-off restoration projects, modern restomod builds, and suspension upgrades where vintage GM C10 chassis receive updated performance systems. Restoration shops, independent builders, and enthusiasts performing in-depth suspension geometry work will find this C-notch solution invaluable for accommodating increased suspension travel and lowering requirements.