55-59 Truck Coilover Backhalf

55-59 Chevy / GMC Truck Coilover Backhalf - #110-8100-BH-C

**This product will have a lead time; please call to verify expected wait**

This air ride backhalf kit will replace the factory rear frame and suspension with a fully engineered 4-link coilover system. Perfect for those who want aggressive ride height with improved handling, without air ride complexity. With the updated coilover geometry, it delivers the adjustability and structural integrity needed for refined handling characteristics across both aesthetic and performance applications.

The rear suspension has been repositioned inboard to allow clearance for wide wheel setups up to 24” x 15”, while maintaining proper suspension travel and drivability. Adjustable coilover mounts provide a 4"-8" frame height range, allowing the chassis to be set low and dialed in for stance, handling, or competition use.

Key Features

• Inboard-mounted air bags and 4-link for 15” wide wheel clearance

• Adjustable coilover mounting allows 4"-8" frame height
  

• Supports wheel widths up to 24" x 15"

• Designed for improved handling and predictable suspension motion

Design & Manufacturing

• OEM chassis laser-scanned for accurate fitment
  

• Components laser cut on Amada CNC laser equipment

• CNC press brake formed for consistent fit

• Machined components produced in-house for strict quality standards

Fitment

• 1955-1959 Chevy & GMC Trucks

What’s Included 

• (1) Welded Rear Frame Rails

• (1) Bridge Assembly

• (2) Billet Watt’s Links (With Jam Nuts, Heim's & Misaligns)

• (1) Watt's Link Center Pivot 

• (1) Watt's Link Mount Bar 

• (2) Frame Reinforcement Plates

• (4) Adjustable 4-Link Bars

• (8) Rod Ends (With Jam Nuts, Crush Sleeves, Bushings, & Zerk Fittings)

• (2) 4-Link Axle Mounts (x1 Circle, x1 Oval)
  

• (2) Coilover Shocks
  

• (1) Hardware Bag & Instructions

Notes

• ASSEMBLY REQUIRED and ships on pallet

• Designed for coilover applications only 

• This will convert a long bed to short bed

• Professional installation and welding recommended

• Intended for custom rear frame replacement setups

California Proposition 65 Warning

Cancer and Reproductive Harm – www.p65warnings.ca.gov

Questions? Contact Us

(480) 940 1806 – Local
1 (877) 951-1890 – Toll Free

At GSI Machine & Fabrication, we offer a one-year warranty on all manufactured parts, covering defects upon inspection. However, we are not liable for personal or property damages resulting from misuse of our products. Note that warranties for non-manufactured parts, such as shocks or ball joints, must be handled directly with the part's manufacturer.

Orders may be canceled before shipment, except for special-order and custom items, such as chassis products and air ride suspension. Refunds for eligible returned items will exclude shipping costs and may incur additional fees. For cancellations or issues with orders, contact our customer support at 1 (877) 951-1890 or sales@gsimfab.com.

Customers are responsible for all customs fees, duties, and taxes on international orders. Once your package is shipped, we are not liable for damage, theft, or loss during transit. Please inspect your delivery promptly and report any issues within 48 hours. For international shipments, local policies may cause delays, and additional documentation may be required. Always ensure shipping details are accurate to avoid additional costs.