
11389611 Rear Frame Rail C-Notch Kit for 1999-2006 GM 1500 2WD Trucks
This Ridetech 11389611 Rear Frame Rail C-Notch Kit is a bolt-in design that increases overall suspension travel on lowered vehicles and comes complete with grade 8 hardware, a template, and detailed installation instructions.
Ridetech 11389611 Rear Frame Rail C-Notch Kit Notes:
- Requires cutting of the rear frame rails
- Requires bed removal and slight modifications
- Also fits 2007 "Classic" Chevy Silverado and GMC 1500 2WD trucks
Unlock maximum suspension travel and achieve an aggressive stance with Ridetech Rear Frame Rail C-Notch Kits, engineered for enthusiasts pushing the limits of lowered performance builds. Designed to create additional clearance between the axle and frame, these kits are essential when lowering trucks or classic vehicles beyond factory limits. Whether you're building a slammed street truck or a pro-touring muscle car, Ridetech rear frame rail C-notch kits provide the structural support and suspension clearance needed for proper function and long-term durability.
Show More
Performance Benefits & Key Features
Ridetech rear frame rail C-notch kits are built to restore and enhance suspension travel in aggressively lowered applications. By modifying the frame rail to accommodate increased axle movement, these kits prevent bottoming out and maintain consistent ride quality under load. This is critical for vehicles equipped with air suspension or performance lowering setups, where maximizing travel directly impacts drivability and handling performance.
Constructed from high-strength steel, Ridetech C-notch kits are engineered for durability and structural integrity. Precision-cut and formed components ensure accurate fitment and proper reinforcement of the frame, maintaining chassis strength even after modification. Many kits are designed to handle increased load ratings and torque demands, making them suitable for high-horsepower builds and trucks used for hauling or performance applications. With robust weld-in designs, these kits provide long-term reliability and confidence under demanding driving conditions.
Fitment, Compatibility & Applications
Ridetech rear frame rail C-notch kits are designed for compatibility across a variety of GM, Ford, and Mopar platforms, particularly classic trucks and muscle cars. Common applications include lowered C10 pickups, F-100s, and other vintage trucks, as well as custom chassis builds requiring additional suspension clearance. Their application-specific engineering ensures proper integration with factory frame dimensions while supporting aftermarket suspension upgrades.
Ideal for street performance builds, show trucks, and restomod projects, these kits are a must-have for enthusiasts aiming to achieve a low stance without sacrificing functionality. They are especially beneficial when paired with air ride systems or coil-over conversions, where increased suspension articulation is essential. Whether you're building a daily driver with a lowered profile or a show-ready truck with maximum drop, Ridetech C-notch kits provide the clearance and strength needed to get it done right.
Backed by Ridetech’s reputation for engineering precision and quality craftsmanship, rear frame rail C-notch kits deliver the performance and reliability serious builders expect. Explore the available options today and take your lowered suspension setup to the next level.

![11382310 Front Coil Springs and Shim Kit for 1999-2006 GM 1500 2WD Trucks [1 in. Drop]](https://www.jegs.com/images/mini_200/0/029/029-11382310.jpg)
![11389511 Rear Lowering Kit for 1999-2006 GM 1500 2WD Trucks [5 in. Drop]](https://www.jegs.com/images/mini_200/0/029/029-11389511.jpg)
![Penetrating Oil [11 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/600/639/639-11043.jpg)
![Brake and Parts Cleaner [14 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/500/555/555-72312.jpg)

![Fender Cover with Pocket [23 in. W x 31 1/2 in. L]](https://www.jegs.com/images/mini_200/500/555/555-65010.jpg)


![2-Ton Low-Profile Aluminum Floor Jack [4,000 lbs. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-80006.jpg)

![Wheel Chock [Solid Rubber]](https://www.jegs.com/images/mini_200/500/555/555-w41001.jpg)
![3-Piece Wire Brush Set [Stainless Steel, Brass Bristles with Plastic Handle]](https://www.jegs.com/images/mini_200/500/555/555-w1149.jpg)
![Socket Set, 3/8 in. & 1/4 in. Drive [SAE/Metric 52-Piece]](https://www.jegs.com/images/mini_200/500/555/555-81565.jpg)

![Breaker Bar [1/2 in. Drive, 30 in. L]](https://www.jegs.com/images/mini_200/500/555/555-w32126.jpg)
![1/2 in. Drive Torque Wrench [10 to 150 ft. lbs.]](https://www.jegs.com/images/mini_200/500/555/555-m200db.jpg)
