BDS 1829FPE 3 inch FOX 2.0 Coilover Lift Kit | 2020-2025 GM 2500HD/3500HD 6.6L Duramax w/o Rear Overload

Features:

• 3-inch lift for improved ground clearance
• Front FOX 2.5 Performance Elite coil-overs
• DSC adjusters for custom shock tuning
• FOX 2.0 rear shocks for better control
• Remote reservoirs for cooler shock temps
• Tuned for on-road comfort and off-road control
• Replaces torsion bars with coil-over setup
• Heavy-duty tubular upper control arms
• Boxed and gusseted lower control arms
• Corrected geometry for smooth steering
• Supports up to 35-inch tire fitment
• Durable black powder coat finish
• 100% bolt-on installation, no cutting required

Engineered Coilover Conversion for Serious Performance

If you're looking to bring out the real potential of your 2020–2025 Chevy Silverado or GMC Sierra 2500HD/3500HD with the 6.6L Duramax, this BDS 3-inch FOX Coilover Lift Kit is a total game changer. It’s more than just a lift—it’s a full performance upgrade that transforms how your truck rides, handles, and looks. Whether you’re gearing up for rugged backcountry trails or just want a better stance and smoother control on the road, this kit delivers serious results without compromising daily drivability. What makes this kit stand out is its conversion from the factory torsion bar setup to a true coilover suspension. Up front, it comes loaded with FOX 2.5 Performance Elite coil-overs featuring remote reservoirs and DSC (Dual Speed Compression) adjusters. These are race-inspired dampers, tuned specifically for HD trucks like yours. You get the best of both worlds: plush comfort during daily driving and quick, responsive control when the terrain gets rough. Dial in the shock feel with a simple twist—tighten it up for aggressive off-roading or soften it for smooth highway cruising.

Heavy-Duty Components Built to Handle It All

This isn’t just about ride height—it’s about strength where it counts. The upper control arms are made from large-diameter, 1.5-inch tubing and fully TIG welded for maximum durability. They’re designed to correct ball joint angles and boost travel, which means fewer limitations when flexing through uneven terrain. Down below, the lower control arms are fully boxed and gusseted to stand up to real-world abuse, whether you're hauling gear or climbing rocky grades. Out back, BDS includes FOX 2.0 Performance Series shocks that are specifically tuned to match the front coilover system. These shocks are no slouch—they’re built to handle heavy-duty action and help maintain control when your bed is loaded or your trailer’s hitched up. Since this kit is designed for trucks without factory rear overload springs, it ensures the lift and damping are perfectly balanced without the need for additional spring assistance. The rear also features upgraded lift blocks and a U-bolt flip kit, which helps maximize clearance while keeping the ride planted and predictable. This kit doesn’t just look tough—it’s been designed with true off-road functionality in mind. Differential relocation brackets help maintain proper CV angles, and extended sway bar links keep everything tight and aligned. It’s built to work with up to 35-inch tires, so you get that aggressive stance without worrying about rubbing or trimming (though some minor trimming might still be needed depending on wheel specs). And because it’s all bolt-on, you won’t need to break out the welder or cut into your frame to get it installed.

Fits: 2020, 2021, 2022, 2023, 2024, 2025 GM 2500HD/3500HD 6.6L Duramax w/o Rear Overload

Note:

• Models with two-piece rear drive shafts require carrier bearing drop kit (BDS121612)
• Requires frame bracket modification and minor welding
• Torsion bar disassembly requires a special unloading tool
• GM specified tool number is CH48809
• Compatible with diesel models only, including AT4 trims
• Not recommended for gas models due to excessive lift
• Some wheel/tire combos may require minor trimming
• Trimming typically involves fender shrouds or bumper valance
• Dually models need 20" aftermarket wheels, max 285/60/20 tires
• Factory 17", 18", and 20" wheels will not clear control arms
• Coil spring compressor is required for coilover disassembly
• Do not increase coilover preload beyond factory settings
• Use service kit BDS081203 for replacement ball joints
• Ball joints must be installed with “dot” facing inward or outward
• Kit increases track width by 1" per side (2" total)

Wheel & Tire Fitment:

• 35 x 12.50 on 17" x 9" w/ 4-1/2 to 5-1/2" Backspacing**
• 285/75 on 17" x 9" w/ 4-1/2 to 5-1/2" Backspacing*
• 35 x 12.50 on 18" x 9" w/ 4-1/2 to 5-1/2" Backspacing**
• 285/70 on 18" x 9" w/ 4-1/2 to 5-1/2" Backspacing*
• 35 x 12.50 on 20" x 9" w/ 4-1/2 to 5-1/2" Backspacing**
• 295/60 on 20" x 9" w/ 4-1/2 to 5-1/2" Backspacing*
• Larger than 20", use 20" wheel specs
• **Trimming is required
• *Trimming may be required
• Stock 17", 18", and 20" wheels will not fit with this suspension system

Install Instructions