88-98 C1500 C-Notch Kit

Modernize your 1988-1998 Chevy & GMC C1500 (OBS) with the most robust bolt-on C-notch kit on the market. Engineered with the builder in mind, this kit provides the necessary axle clearance for lowered stances while significantly reinforcing the factory frame rails.

The GSI C-Notch is a 100% bolt-in solution, measuring an impressive 25-1/2" in length to distribute stress loads across a larger surface area of the frame. Precision-manufactured for the GMT400 platform, this kit ensures a straightforward installation without the need for a welder. To guarantee long-term durability, every notch comes powder-coated in semi-gloss black and includes a full set of Grade-8 hardware.

Features & Benefits

• Maximum Reinforcement: 1/2" long design for superior frame rigidity.

• Overbuilt Hardware: Utilizes 1/2"-13 Grade-8 bolts for a secure, permanent fit.

• True Bolt-In: Developed for ease of installation with no welding required.

• Premium Finish: Semi-gloss black powder coat for professional-grade corrosion resistance.

• Precision Fit: Includes a metal template to ensure perfect alignment and cutting.

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Installation Overview

• Frame Preparation: Use the included metal template to mark your cut lines.

• Bolt-In Design: Each side is secured using 16 Grade-8 hex head bolts.

• Compatibility: Engineered specifically for the 88-98 C1500 (GMT400) frame rails.

• One-Person Install: Straightforward process that can be completed with basic shop tools.

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Kit Includes

• (2) Driver & Passenger Side C-Notches (25-1/2" Long)

• (32) 1/2-13 Grade-8 Hex Bolts

• (32) 1/2-13 Grade-8 Lock Nuts

• (64) Grade-8 Flat Washers

• (1) Precision Metal Template

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.