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 weighs118 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
Notes
Bolt-on: NO welding required
Recommended use to restore or improve structural integrity
