UMI’s Race Proven #cornermax a-arm and mount kit brings race car handling to your truck. Double shear coilover-only mounts hold all popular coilover assemblies.

Direct bolt-in upper mount (required grinding of factory rivets).
Double shear mounts accepts most racing coilover shocks.
Adjust camber and caster, often with no shims required.
Tall ball joint improves camber gain.
Increased caster improves steering feedback.
Change springs and shocks without disassembling ball joints.
Adjustable steering stops.
Race Proven #cornermax geometry.
100% Made in Philipsburg, PA – USA and always of USA materials.

Upgrade your classic truck’s suspension and handling with the UMI Performance C10 4-Link Suspension Kit—the premier solution for 1973-1987 Chevy and GMC squarebody owners looking to unleash the full potential of their ride.

The UMI 6425 kit replaces the outdated leaf spring setup on your C10 with a race-inspired 4-link rear suspension system featuring unequal length trailing arms, an adjustable panhard bar, and high-performance Viking coilovers (add-on). Engineered for serious street and pro-touring enthusiasts, this suspension kit is tuned for maximum traction, precision alignment, and stellar ride comfort. Whether it's weekend cruising, autocross, or high-power builds, the UMI 4-link delivers proven results.

Unequal length trailing arms for maximum performance
Adjustable panhard bar for axle centering and roll center tuning
Double adjustable, race-proven Viking coilovers
Heavy-duty crossmember for strength and regidity
Works with factory or UMI relocated fuel tanks
Minimal fabrication for installation
6 inch drop nominal ride height range
Made in the USA, track tested for confidence

73-87 C10 Coilover Kits

UMI Front / Rear Cornermax Coilover System - 73-87 C10