CFMi - Zero Lift Shackle Flip Kit for 1973–1991 Squarebody Chevy Trucks, K5 Blazers and GMC Jimmys

CFM Industries Zero Lift Shackle Flip Kit

Improve suspension performance and articulation on your Squarebody without adding unnecessary lift. This adjustable zero lift shackle flip kit is designed for 1973–1987 (’91 R/V) Chevy and GMC trucks, K5 Blazers, and GMC Jimmys, allowing your rear suspension to move more freely while maintaining near-stock ride height.

This is a great option for builders who want better suspension function, smoother ride quality, and improved off-road capability without raising the truck higher than desired.

Features and Benefits

• Zero lift shackle flip design (ride height varies by setup)
• Improves suspension travel and articulation
• Multiple mounting positions for dialing in shackle angle
• 1-inch spaced adjustment holes
• Offset mounting holes allow 1/2-inch fine adjustment
• Welded nut strips for easier installation and improved load distribution
• Designed for custom suspension tuning

Fitment

Fits 1973–1987 (1991 R/V) Chevy and GMC Squarebody trucks, K5 Blazers, and GMC Jimmys.

What’s Included

• Shackle flip brackets
• Welded nut strips
• Mounting hardware

Optional Add-On

• Heavy-duty custom-length shackles available

Installation

• Requires removal of factory rear shackle hangers (rivets must be drilled or ground out)
• Bolt-in design using existing frame holes after hanger removal
• Gas tank removal recommended for easier installation (not required)
• Nut strips can be guided into the frame using wire if tank remains installed
• Shackle position is adjustable to match spring length and desired geometry

Performance Notes

• Designed to maintain near-stock ride height
• Actual ride height will vary depending on shackle length, angle, spring rate, and bushing condition
• Best results achieved with proper shock length and healthy suspension components

Production

• Made to order
• Typical lead time: 2–7 days before shipping

Why This Upgrade Works

This zero lift shackle flip is ideal for Squarebody owners who want better suspension performance without increasing ride height. It allows the suspension to cycle more naturally while giving you the flexibility to fine-tune geometry for your specific setup.