Product Overview
RTZ Chevrolet Silverado GMC Sierra 1500 4/6 Lowering Kit – 4" Front Drop Spindles & Coil Springs + 6" Rear Axle Flip Kit + RTZTech Primo Nitro Shocks (1999–2006 2WD V8)
The RTZ 4/6 lowering kit for the 1999–2006 Chevrolet Silverado and GMC Sierra 1500 2WD V8 is a complete slam kit built for owners who want a proper low stance with the handling and ride quality to back it up. This package brings together ductile iron 2-inch drop spindles, load-tested front lowering coil springs, a rear axle flip kit, a frame notch kit, and a full set of RTZTech Primo Nitrogen Gas Charged Slammer Shocks everything needed to drop your Silverado 4 inches up front and 6 inches in the rear in one order. If you're looking to buy a Silverado 4/6 lowering kit with shocks online, this is the complete solution built for a slammed sport stance.
The front lowering system combines ductile iron drop spindles with load-tested coil springs, a proven pairing that gives you smooth front drop without sacrificing steering geometry or ride quality. At the rear, the axle flip kit repositions the axle above the leaf springs to achieve the full 6-inch drop, and the included frame notch kit provides the clearance needed to run the truck as low as possible. RTZTech Primo nitro slammer shocks are included to complete the package and deliver the refined handling you expect from a properly lowered truck.
What's Included:
- Pair of 2-inch ductile iron drop spindles front
- Front lowering 2-inch coil springs, load-tested
- Rear axle flip kit, 6-inch rear drop
- Frame notch kit required for full drop clearance
- Full set of RTZTech Primo Lowered Nitrogen Gas Charged Slammer Shocks
- Designed in the USA; rolled steel, welded, CNC lasered, ductile iron formed, chromoly shaft precision machined, certain parts robotic welded
- Powder-coated to prevent corrosion
- Must run 17-inch or larger rims
- Primarily bolt-on installation with required frame notching
- Limited Lifetime Warranty
Fitment: Compatible with 1999–2006 Chevrolet GMC Silverado Sierra 1500 Pickup 2WD V8. Please check our other listings for different drop heights and other options.
Dropping a Silverado 4 inches front and 6 inches rear is not a simple bolt-on job; it requires frame notching for rear clearance and 17-inch or larger wheels to clear the larger brakes that come with spindle-based front drop. This kit is built for owners who understand what a proper 4/6 slam involves and want components that are engineered and manufactured to handle the demands of a slammed daily driver or show truck. Professional installation by a qualified technician with proper equipment is strongly recommended. Please inspect all parts before beginning installation.
Get a 5% discount at checkout. Use code "RIDETRENDZ"
Browse our full range of Chevrolet GMC Silverado Sierra Lowering Kits to compare drop heights and configurations. For more on what a lowering kit does to your truck's handling and ride, read our guide on the benefits, risks, and the right lowering kit to buy.
Order the RTZ Silverado 4/6 lowering kit with shocks today and build the slammed Silverado stance the right way.
Frequently Asked Questions
- Does this kit require frame notching?
Yes. The 6-inch rear drop requires frame notching for proper clearance. A frame notch kit is included in this package. Professional installation by a qualified technician is strongly recommended. - What wheel size is required with this lowering kit?
This kit requires 17-inch or larger rims due to the larger brake components associated with the spindle-based front drop system. - What makes spindle-based front drop different from coil spring drop alone?
Drop spindles reposition the wheel hub lower on the spindle to achieve the drop while keeping the suspension travel and geometry closer to factory spec, a more refined approach than relying solely on lowered coil springs for the full front drop height.
