73-87 C10 Squarebody Inner Frame Stiffener Kit

73-87 Inner Frame Stiffener Kit - #130-8310

This bolt-on inner frame stiffener kit is designed for 1973-1987 Chevy & GMC Squarebody short bed trucks and reinforces the factory frame rails to reduce chassis flex commonly found in aging C10 frames. By strengthening the inner rail structure, the chassis gains increased rigidity, resulting in a tighter, more predictable feel on the road.

Constructed from ASTM A1011 hot-rolled steel, the stiffeners are engineered for strength, consistency, and excellent weld quality while preserving proper frame geometry. This kit is ideal for restoration builds, lowered trucks, and high-horsepower applications, restoring structural integrity without cutting or modifying the factory frame.

Key Features

• Reduces frame flex in factory C10 chassis
  

• 3/16” ASTM A1011, weighs 118 lbs.

• Designed to clear 3.5” exhaust tubing

• Adjustable mounting components for proper driveline alignment

Fitment

• 1973-1987 Chevy & GMC Squarebody Short Bed Trucks

What’s Included

• Inner Frame Rail Stiffeners (L&R)

• Front Frame C's (L&R)

• Rear Frame C's (L&R)

• Front Transmission Crossmember Brackets (L&R)

• Rear Carrier Bearing Crossmember Brackets (L&R)

• Carrier Bearing Crossmember

• Transmission Crossmember

• Hardware Bag & Instructions

Notes

• Bolt-on, NO welding required

• Recommended use to restore or improve structural integrity

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.