12" inch Performance Lift Kit with Fox PSRR 2.0 Shocks

Features:

• 12-inch front lift height for aggressive stance
• 9-inch rear lift with Deaver leaf springs
• Includes Fox 2.0 Remote Reservoir Shocks
• Improved ride quality and off-road handling
• Corrected CV and ball joint angles
• SM Series boxed upper control arms included
• Patented Pitman and Idler Arm Support Kit
• Forged torsion bar keys for added strength
• Heavy-duty sway bar reduces body roll
• Allows up to 40x15.5 tires with 12" wheels
• Stainless steel extended brake lines included
• Engineered and made in the USA

Take Your HD To A Whole New Level

If you’re ready to turn your 2011-2019 Silverado or Sierra 2500HD/3500HD into something that looks and performs like a serious build, the Cognito 12-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks checks every box. This all-in-one package eliminates the guesswork by bundling premium components engineered specifically for your GM HD truck. The result is a massive transformation that not only delivers killer stance and clearance, but also keeps the ride comfortable and controlled on any terrain. With a full 12 inches of front lift and 9 inches of rear lift from the Deaver leaf pack, you’re clearing bigger tires with ease and gaining the aggressive profile most lifts can’t offer without compromising quality. The included Fox 2.0 remote reservoir shocks step in to handle the abuse, offering precise damping, better cooling, and confident control on and off the road. Whether you’re hauling a trailer, crawling rocky lines, or just want to own the streets, this kit supports it all with American-built reliability. Plus, it’s made for the DIYer who’s ready to take on a full-day install and come out the other side with a truck that demands attention.

Built For Big Lift Without Losing Control

This kit isn’t just about height, it’s about serious engineering that addresses the key weak points of lifting an HD truck. Cognito’s SM Series boxed upper control arms come standard and feature corrected ball joint angles to maintain suspension geometry and allow proper droop travel, preserving ride comfort across all surfaces. The Deaver rear leaf springs are a full replacement, arched to deliver 9 inches of lift while using thinner, high-count leafs to keep the rear end compliant without losing strength. To ensure long-term durability, the kit includes a patented Pitman and Idler Arm Support Kit designed to eliminate unwanted steering play and reduce wear in one of GM’s most notorious trouble spots. Up front, a 1.5-inch HD sway bar built from heat-treated chromoly improves cornering feel and cuts down on body roll, especially when driving loaded or towing. Fox’s 2.0 Performance Series shocks bring factory-tuned valving, rust-resistant aluminum bodies, and external reservoirs to help manage shock temps under tough conditions. Rounding it out is a set of stainless steel extended brake lines, forged torsion bar keys, and 5-inch rear blocks with heavy-duty U-bolts to lock in the lift. Every piece in the kit is designed to work together for a ride that stays smooth, predictable, and strong, no matter what kind of miles you throw at it.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Silverado/Sierra 2500HD/3500HD

Notes:

• Fits 2011-2019 GM Silverado/Sierra 2500HD and 3500HD models
• Compatible with both 2WD and 4WD configurations
• Professional alignment recommended after installation
• Allows up to a 40x15.5 tire on a 12-inch wide wheel with 5-inch backspacing
• Requires trimming for optimal tire clearance in some cases
• Estimated install time is approximately 17 hours for experienced DIYers
• Designed and manufactured in the USA using high-quality materials
• Includes all necessary components for a complete lift solution
• Engineered for improved ride quality and suspension geometry correction
• Not compatible with trucks equipped with factory rear air suspension
• Shock tuning is specific to this kit for ideal performance