Transform Your 1973-1987 Chevy or GMC Squarebody with the UMI 6425 4-Link Suspension Kit

If you're a proud owner of a 1973-1987 Chevy or GMC squarebody, it’s time to elevate your truck's performance with the UMI Performance C10 4-Link Suspension Kit. This isn’t just an upgrade; it’s a complete transformation that replaces your outdated leaf spring setup with a cutting-edge 4-link rear suspension system designed for serious street and pro-touring applications.

Why Choose the UMI 6425 Kit?

The UMI 6425 kit is engineered for those who demand precision and performance from their ride. Featuring unequal length trailing arms, an adjustable panhard bar, and optional high-performance Viking coilovers, this kit is built to maximize traction, improve alignment, and enhance ride comfort. Whether you're hitting the weekend car shows, tackling autocross events, or building a high-powered street machine, this suspension kit delivers results you can feel.

Key Features

• Unequal Length Trailing Arms: Designed to improve axle control, reduce wheel hop, and significantly enhance traction compared to factory leaf springs. This upgrade optimizes your C10’s suspension geometry for both street cruising and performance driving.
• Adjustable Panhard Bar: Easily center your rear axle after lowering your truck or making height adjustments. Fine-tune the bar length to dial in your rear roll center, allowing you to customize handling and body roll to your liking.
• Instant Center Adjustable Chassis Mounts: Quickly modify suspension pickup points to optimize anti-squat and weight transfer during acceleration, giving you the edge for drag strip launches and improved cornering grip.
• Heavy-Duty Crossmember: This component adds strength and rigidity, maintaining chassis integrity under aggressive loads and tying the entire rear suspension assembly together. For even greater stability, consider adding the optional PN 6426 rear frame brace.
• Fuel Tank Relocation Compatibility: Integrated crossmember mounting points allow for easy installation of the optional PN 6428 fuel tank relocation kit.
• Minimal Fabrication Required: Installation is straightforward, requiring only basic fabrication like drilling out old spring perch rivets and trimming for the included notch kit. No excessive modifications are needed—just bolt it on after completing the frame modifications.
• Aftermarket Rear Ready: The included lower rear-end panhard bar mounting bracket is designed to clear most aftermarket rear ends with additional center section bracing.
• Race Proven, Made in the USA: Every UMI 4-link kit is engineered, manufactured, and tested in the USA, ensuring top-notch quality and performance.
• Coilover Key Features: The Viking Performance C209-W shock offers 19 distinct adjustment positions for both compression and rebound, allowing you to dial in the perfect ride quality and performance for your specific driving style.

Specifications

• Adjustable: Yes
• Air Adjustable: No
• Color: Red
• Finish: Black Powdercoated
• Grade Type: Performance
• Material: Steel
• Mounting Hardware Included: Yes
• Sway Bar Color: Black Powdercoated

Installation Instructions

• For detailed installation instructions, CLICK HERE.

Fitment

• Chevrolet C10 Pickup 1973-1974
• Chevrolet C10 1975-1986
• Chevrolet R10 1987
• GMC C15/C1500 Pickup 1973-1974
• GMC C1500 1979-1986
• GMC C15 1975-1978
• GMC R1500 1987

Upgrade your classic truck's suspension and handling with the UMI Performance C10 4-Link Suspension Kit and experience the difference on the road. This kit is designed for owners who appreciate precision engineering and want to take their squarebody to the next level.