CFMi - Adjustable Rear Spring Hangers for 1973–1991 K5 Blazers and GMC Jimmys

CFM Industries Adjustable Rear Spring Hangers

Upgrade your Squarebody suspension with adjustable rear spring hangers designed specifically for 1973–1991 Chevy K5 Blazers and GMC Jimmys. These heavy-duty brackets allow you to move the rear spring mounting point forward while maintaining proper axle placement and improving suspension performance.

With up to 6 inches of forward adjustment in 1-inch increments, these hangers are ideal for long spring conversions, improved ride quality, and increased articulation without sacrificing ground clearance.

Features and Benefits

• Adjustable rear spring hanger design
• Up to 6 inches of forward mounting adjustment
• 1-inch spaced mounting holes for precise setup
• Maintains axle centerline when used correctly
• Improves ground clearance compared to traditional hanger relocation
• Ideal for long leaf spring conversions
• Designed for off-road and custom suspension builds

Fitment

Fits 1973–1991 Chevy K5 Blazer and GMC Jimmy only.

Important Fitment Notes

• Not compatible with pickup trucks due to rear fuel tank interference
• Designed specifically for Blazer and Jimmy chassis

Spring Compatibility

• Allows use of longer rear leaf springs
• Supports conversions from factory 52-inch springs to up to 64-inch springs
• Works with extended-length suspension setups for improved ride and flex

Setup Notes

• When running longer springs, rear shackle position must be adjusted
• Requires either relocating rear shackle hangers or using an adjustable shackle flip kit
• Designed to keep axle centerline in the stock location when properly configured

Installation

• Rear hanger replacement requiring removal of factory components
• Frame modification and drilling may be required
• Best suited for custom suspension builds and experienced installers

Options

• Available in 6-bolt (most common) configuration
• 4-bolt option available

Production

• Made to order
• Typical lead time: 2–10 days before shipping

Why This Upgrade Works

These adjustable rear hangers give Squarebody owners the ability to run longer springs and improve suspension geometry without lowering the truck or sacrificing clearance. It is a key upgrade for building a smoother, more capable suspension system.