GSI 73-87 Chevy GMC C10 Squarebody Bolt-In Rear C-Notch Kit Lowering & Air Ride For Sale - New and Used

GSI 73-87 Chevy/GMC C10 Squarebody Bolt-In C-Notch Kit

Lower your 1973-1987 Chevy & GMC Squarebody with confidence using the GSI Bolt-In C-Notch Kit. Engineered specifically for the 2WD C10 platform, this kit provides the essential axle clearance required for trucks dropped more than 4 inches, preventing frame-to-axle contact and restoring proper suspension travel.

The GSI C-Notch is a heavy-duty, 100% bolt-in solution constructed from 1/4\" ASTM A1011 hot-rolled steel. By eliminating the need for welding, this kit allows for a professional-grade installation in your own garage. Whether you are running a static drop or full air ride, the precision-fit design and included Grade 8 hardware create a secure, heavy-duty connection.

C-Notch Specifications

• Length: 17\"

• Weight: 26 LBS

• Hardware: 1/2\"-13 High-Strength Zinc-Plated Bolts

• Best for: Trucks that need axle travel and have been lowered 4 inches or more

Key Features & Benefits

• Increased Clearance: Provides the necessary room for the axle to travel on heavily lowered setups

• Simple Bolt-In Design: Engineered for a straightforward installation that makes it a breeze compared to traditional weld-in notches

• Versatile Fitment: Ideal for both static lowering kits and custom air ride applications

• Enhanced Travel: Maintains proper suspension geometry and prevents harsh bottoming out

• Precision Alignment: Includes a metal installation template to ensure your frame cuts are perfect every time

• Heavy-Duty Construction: Built from 1/4\" ASTM A1011 hot-rolled steel, then laser-cut, precision-formed, and finished in semi-gloss black powder coat

Vehicle Applications

• 1973-1987 Chevy C10 / C20 (Squarebody)

• 1973-1987 GMC C15 / C25 (Squarebody)

• Standard, Extended, & Crew Cab 2WD Notes

  • Setup: Specifically recommended for rear drops greater than 4 inches

  • Secure Bolted Connection: The precision-fit notches and included Grade 8 hardware create a strong, heavy-duty connection without welding

  • Precision: Use the included metal template for accurate marking and cutting of the factory frame rails

  What’s Included

  • (2) Driver & Passenger Side Rear Frame C-Notches

  • (26) 1/2\"-13 x 1.25\" Hex Head Bolts

  • (26) 1/2\"-13 Nylock Nuts

  • (52) 1/2\" Flat Washers

  • (1) Metal Installation Template

  About GSI Machine & Fabrication

  Based in Arizona, GSI Machine & Fabrication is a family-owned premier manufacturer recognized nationwide for elite custom truck engineering. While we are known for our full custom chassis and high-end air ride systems engineered to lay frame, we bring that exact same uncompromising DNA to every individual component we produce.

  Every part we list here is designed, manufactured, and tested completely in-house at our Chandler, AZ facility to ensure maximum strength, perfect fitment, and real-world drivability.

  Why the Truck Community Trusts GSI:

  • The Same DNA: The specialized components available here inherit the exact same precision, heavy-duty materials, and CAD-designed accuracy as our flagship full chassis builds.

  • Show-Proven Quality: Our reputation is built on the pavement and proven on the show floor. You’ll regularly find GSI-built trucks turning heads at major events like SEMA, Dino\'s Git Down, C10 Nationals, Goodguys, C10 Fall Revival, the Red Rock Retreat & more.

  • Built by Enthusiasts: From local garage builds to high-end professional projects across the country, we stand behind what we make because we run these exact parts on our own trucks

  
  

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