KSP PERFORMANCE 2in Rear Drop Shackle Kit for Silverado/Sierra 1999-2019 — 1-2in Adjustable Drop, Polyurethane Bushings

KSP PERFORMANCE 2" Rear Drop Shackle Kit lowers 1999–2019 Sierra/Silverado 1500 rear ride height by 1"–2" with replaceable polyurethane bushings and greaseable fittings for durable, quieter lowering.

If you want a straightforward, reversible way to lower the rear of your Silverado or Sierra 1500 (6-lug) without cutting springs or permanent modifications, this adjustable KSP PERFORMANCE shackle kit is built for that purpose. Designed to fit 1999–2019 2WD and 4WD trucks, the kit gives you precise control over a 1"–2" rear drop using hardened components, TIG welds and a powder-coat finish to resist corrosion. It includes everything needed to install and maintain the shackles and is backed by a 30-day refund and 12-month replacement policy.

How much rear drop will this shackle kit give my 1500, and is it adjustable?

The kit is engineered to lower the rear axle between 1" and 2" depending on how the adjustable shackles are installed. That range covers most common desired drops for improved stance or leveled look without changing leaf springs. For 2020 models you may need additional washers to achieve the correct orientation.

• Adjustable design provides 1"–2" of rear drop.
• Fitment: 1999–2019 Silverado/Sierra 1500, 6-lug, 2WD and 4WD.
• 2020 trucks require extra washers (not included) for proper fit.

What materials and construction keep these shackles durable on the road?

KSP PERFORMANCE uses heavy-duty steel components with TIG welding for stronger, cleaner joints than typical MIG-welded alternatives. The shackles have a powder-coated finish to resist rust and come with replaceable polyurethane bushings that tolerate load and reduce noise compared with worn rubber.

• TIG-welded construction for reinforced strength.
• Powder-coat finish to minimize corrosion over time.
• Replaceable, greaseable polyurethane bushings for longevity and quieter operation.

How do the grease fittings and maintenance features work?

Each shackle includes tapped holes for zerk (grease) fittings that thread in securely so fittings don’t back out during use. The kit ships with grease zerks—install them before fitting the shackles to the truck and add lubricant to prevent squeaks and ensure the polyurethane bushings remain conditioned.

• Threaded zerk holes to keep grease fittings firmly seated.
• Kits include grease zerks and instructions for initial lubrication.
• Periodic greasing prolongs bushing life and reduces noise.

Is installation difficult, and what comes in the box?

Installation is straightforward and does not require welding; standard hand tools and basic mechanical skill are sufficient. Depending on model year the shackles can be oriented differently—follow the included instructions or contact KSP PERFORMANCE support if unsure. The package arrives ready for installation with the hardware and fittings needed for most applications.

• Included: 2 rear lowering shackles, 2 grease zerks, and pro installation instructions.
• No welding required; basic tools and torque procedures needed.
• Customer support available—KSP offers 30-day refunds and 12-month replacement parts.

Who this is for: Truck owners who want a reversible, cost-effective way to lower the rear of a 1999–2019 Silverado or Sierra 1500 (6-lug) for improved stance, towing balance, or pairing with a front leveling kit. It’s ideal for DIY installers who prefer replaceable bushings, greaseable fittings, and a rust-resistant finish over permanent spring modifications. If you drive a 2020 or newer model, prepare to source extra washers as required for fitment.