dynofit 2in Rear Lowering Shackles for 1999–2019 Silverado 1500 & Sierra 1500 — TIG-welded steel, polyurethane bushings, 1–2in dro

Dynofit 2" rear drop shackles lower compatible 1999–2019 Chevy Silverado 1500 and GMC Sierra 1500 trucks by approximately 1–2 inches to improve stance and balance while retaining factory mounting points.

These rear lowering shackles are a bolt-on aftermarket solution designed for 6-lug Silverado and Sierra 1500 models from 1999 through 2019, in both 2WD and 4WD configurations. Built with TIG-welded steel, durable black powder-coating and replaceable polyurethane bushings, the kit aims to offer a stronger, longer-lasting alternative to stock shackles. The package includes two rear lowering shackles and two grease zerks; part number 410520 matches common replacement listings.

How much rear drop can I expect with these Dynofit shackles?

Installed as intended, the shackles provide an approximate 1 to 2 inch lowering of the rear ride height. Actual drop varies by year, suspension condition and load; different Silverado model years may mount in different orientations, affecting final height.

• Typical rear drop range: 1–2 inches
• Fitment varies by year and axle configuration
• Final ride height influenced by springs, tires and payload

What materials and construction make these shackles durable?

Dynofit uses heavy-gauge steel with TIG welding for reinforcement, then applies a black powder coat to reduce corrosion. The bushings are polyurethane for improved wear resistance and quieter operation compared with bare metal mounts.

• TIG-welded steel for stronger seams than typical MIG-welded parts
• Black powder coat finish for corrosion resistance
• Replaceable polyurethane bushings to reduce noise and extend life
• Tapped holes for grease zerks to keep lubrication secure

How difficult is installation and what comes in the box?

Installation is straightforward and clamps into the existing suspension mounts — no welding required. Installers should fit the included grease fittings before mounting the shackles, then add grease to the bushings to avoid squeaks and ensure smooth operation.

• Includes: 2 rear lowering shackles and 2 grease zerks
• Bolt-on installation; no welding needed
• Install grease fittings and lubricate before mounting
• Be aware of different mounting directions across model years

Will these affect ride quality or handling?

Lowering the rear can reduce the truck’s center of gravity and balance the stance, which some owners find improves cornering feel and reduces nose-up attitude under load. Changes are subtle and depend on other suspension components and cargo weight.

• Can level truck stance and reduce rear sag under load
• May slightly change handling characteristics—test drive after installation
• Compatible with factory springs; check alignment after fitting

Who is this for: The Dynofit 2" rear drop shackles are intended for owners of 1999–2019 Chevy Silverado 1500 and GMC Sierra 1500 (6-lug) who want a durable, bolt-on way to lower the rear 1–2 inches and improve stance without major suspension modifications. These are well suited to DIY installers, professional mechanics, and truck owners wanting replaceable polyurethane bushings, corrosion-resistant finish, and reinforced welding for longer service life. Replacement part number: 410520. For fitment questions, verify your model year, axle type and lug configuration before purchase.