Fabtech 4" Performance System with Dual 2.5" & 2.25" Downlinks

2014–2018 GM Chevrolet Silverado 1500 / GMC Sierra 1500 5.3L / 6.2L V8

Part #: K1120DL

Overview

The Fabtech 4" Performance System with Dual 2.5" & 2.25" Downlinks is a premium suspension upgrade designed specifically for 2014–2018 GM Silverado 1500 and GMC Sierra 1500 pickups. Engineered to deliver a balanced combination of performance, durability, and a commanding stance, this system is ideal for enthusiasts seeking enhanced off-road capability and a more aggressive appearance without sacrificing ride quality.

Built with heavy-duty construction and proven design features, this system provides a reliable solution for those looking to fit 33-inch tall tires while maintaining a factory-like appearance and handling. Whether you're tackling rugged trails or upgrading your truck for improved street presence, this performance lift kit offers the perfect blend of strength and style.

Key Features

The Fabtech 4" Performance System is packed with innovative features that ensure durability and performance:

• Heavy-duty 1/4-inch thick steel high arched lower control arm crossmembers provide maximum strength and longevity, supporting aggressive off-road use and demanding driving conditions.
• Retains the stock track width through ductile iron steering knuckles, ensuring your tires stay under the fenders for a clean, OEM-like appearance and proper handling.
• Utilizes proven block and u-bolt rear lift components for reliable and straightforward installation, providing a balanced lift height suitable for 33-inch tires.
• Designed with precision to maintain factory ride quality while offering increased ground clearance and improved off-road capability.
• Constructed with high-quality materials and TIG-welded for superior durability and fitment accuracy.
• Compatible with OE aluminum or stamped steel upper control arms, allowing for flexibility based on your existing setup or upgrade preferences.
• Includes all necessary hardware and components for a bolt-on installation, minimizing downtime and complexity.
• Optimized for a smooth ride and enhanced handling, whether on-road or off-road.

Construction & Design

The Fabtech 4" Performance System features a robust design centered around heavy-duty steel components. The high arched lower control arm crossmembers are crafted from 1/4-inch thick steel, providing exceptional strength to withstand the rigors of off-road adventures and heavy loads. The ductile iron steering knuckles are engineered to retain the factory track width, ensuring proper alignment and steering response.

The system employs a combination of high-quality materials and precision manufacturing techniques, including TIG welding, to guarantee a precise fit and long-lasting performance. The rear lift is achieved with a simple block and u-bolt setup, offering a reliable and straightforward installation process. Overall, the design emphasizes durability, strength, and maintaining the vehicle's factory handling characteristics.

Performance & Sound

This lift system enhances your truck's off-road capability by increasing ground clearance and allowing for larger tires, which improves approach and departure angles. While it doesn't specifically claim horsepower gains, the increased clearance and improved suspension geometry contribute to better off-road performance and a more commanding driving experience. The system maintains a factory-like ride quality, ensuring comfort during daily driving while providing the robustness needed for off-road adventures.

Installation & Fitment

The Fabtech 4" Performance System is designed as a bolt-on upgrade, making it accessible for experienced DIY enthusiasts and professional installers alike. The system uses existing factory mounting points and requires no cutting or drilling in most cases. The installation process involves replacing the factory control arms and rear blocks with the provided components, ensuring a secure and precise fit. No special tuning or alignment adjustments are typically necessary beyond standard procedures, and the system is engineered to preserve factory handling and steering response.

• Complete bolt-on installation with all necessary hardware included
• No cutting, drilling, or welding required in most applications
• Suitable for 2014–2018 GM Silverado 1500 and GMC Sierra 1500 pickups with OE aluminum or stamped steel upper control arms

What's Included

• High arched lower control arm crossmembers
• Steering knuckles
• Rear lift blocks and u-bolts
• All necessary mounting hardware and brackets
• Detailed installation instructions

Ideal For

This performance lift system is perfect for truck owners who want to enhance their vehicle's off-road capabilities, improve ground clearance, and achieve a more aggressive stance. It's well-suited for off-road enthusiasts, daily drivers seeking a rugged look, and those planning to run 33-inch tires for improved traction and appearance.