QA1 99-06 Chevy Silverado 1500 Short Bed Single Adjustable Rear Suspension Kit

QA1 R145-200 Rear Coilover Conversion System, 99-06 Silverado/Sierra 1500 2WD, Single Adjustable, Short Bed Product Overview If you're ready to move beyond stock leaf springs, QA1’s rear suspension system is the upgrade your truck’s been waiting for. Built specifically for 1999–2006 2WD Silverado and Sierra 1500s, it’s a major step up in traction, ride quality, and overall drivability. MORE TRACTION. NO BIND. BETTER STREET MANNERS The torque arm setup replaces your leaf springs with a true multi-link system that eliminates bind, improves pinion angle control, and helps your truck put power down more effectively. This is the kind of upgrade that makes your truck feel planted and predictable. DIAL IN YOUR RIDE WITH QA1 COIL-OVERS Tailor the driving feel to your liking with QA1 single adjustable shocks. These shocks offer 18 clicks of combined compression and rebound adjustment to dial in a balance of performance and comfort. With up to 4"–7" of drop range, you can set the perfect stance while still enjoying a comfortable, confident ride. BOLT-ON DESIGN WITH CROSSMEMBER REPLACEMENT You won’t need a welder or fabrication shop to get this done. QA1 includes a bolt-in fuel tank crossmember that replaces the rust-prone factory piece while keeping your stock fuel tank and lines in place. The full system installs with basic hand tools and includes all the necessary hardware and instructions. MADE IN THE USA QA1 Torque Arm suspension is proudly made in Lakeville, Minnesota. Fitment Notes Fits 1999–2006 Chevrolet Silverado 1500 2WD – Short Bed Only: For use with 10 bolt axle only: Rear sway bar not included—available separately (Part Number: 52880): Modification to exhaust required

• Big upgrade in traction, ride comfort, and suspension control
• Includes bolt-in fuel tank crossmember—no welding needed
• Single adjustable coil-overs with 18 clicks of adjustment
• Works great with QA1’s rear sway bar (sold separately)
• Torque arm design eliminates bind and improves rear grip
• Panhard bar helps maintain lateral alignment under load
• Designed for easy installation with basic tools
• Spanner wrench and thrust bearing included
• Adjustable drop range from 4"–7" lower
• Made in the USA

Upgrade the rear suspension of your 1999-2006 Chevrolet Silverado or GMC Sierra 1500 2WD short bed with the QA1 R145-200 Rear Coilover Conversion System. Designed to replace the factory leaf-spring arrangement with a torque arm and multi-link suspension layout, this system improves traction, rear-end control, ride quality, and overall drivability. It is engineered for vehicles using a 10-bolt rear axle and provides a more planted, predictable feel on the street or during performance driving.

The included QA1 single-adjustable coilover shocks provide 18 clicks of combined compression and rebound adjustment, allowing you to balance ride comfort and handling to suit your truck and driving style. The suspension offers an adjustable drop range of approximately 4 to 7 inches, helping you achieve a lower stance while retaining controlled, responsive suspension performance. A torque arm helps reduce suspension bind and improve pinion angle control, while the panhard bar maintains rear axle lateral alignment under load.

This bolt-in conversion system includes a fuel tank crossmember that replaces the factory crossmember while allowing the stock fuel tank and fuel lines to remain in place. Installation is designed for basic hand tools with no welding or fabrication required. The kit includes necessary mounting hardware, instructions, a spanner wrench, and a thrust bearing. Exhaust modification is required, and the rear sway bar is not included; QA1 rear sway bar Part Number 52880 is available separately.

QA1 R145-200 is proudly manufactured in the USA and is intended for 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500 2WD short bed applications only. Verify vehicle configuration, rear axle type, and application requirements before installation.

Features:

• Improves rear traction, ride comfort, and suspension control
• Designed for 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500 2WD short bed models
• Compatible with 10-bolt rear axles
• Includes single-adjustable QA1 coilover shocks with 18 adjustment clicks
• Provides an adjustable drop range of approximately 4 to 7 inches
• Torque arm design reduces bind and improves pinion angle control
• Panhard bar helps maintain rear axle alignment under load
• Includes bolt-in fuel tank crossmember with no welding required
• Retains the stock fuel tank and fuel lines
• Includes mounting hardware, installation instructions, spanner wrench, and thrust bearing
• Exhaust modification is required
• Rear sway bar sold separately; compatible QA1 Part Number 52880
• Made in the USA

Fitment:
Chevrolet Silverado 1500 Base 1999
Chevrolet Silverado 1500 Base 2000
Chevrolet Silverado 1500 Base 2001
Chevrolet Silverado 1500 Base 2002
Chevrolet Silverado 1500 Base 2003
Chevrolet Silverado 1500 Base 2004
Chevrolet Silverado 1500 Base 2005
Chevrolet Silverado 1500 Hybrid 2004
Chevrolet Silverado 1500 Hybrid 2005
Chevrolet Silverado 1500 Hybrid 2006
Chevrolet Silverado 1500 LS 1999
Chevrolet Silverado 1500 LS 2000
Chevrolet Silverado 1500 LS 2001
Chevrolet Silverado 1500 LS 2002
Chevrolet Silverado 1500 LS 2003
Chevrolet Silverado 1500 LS 2004
Chevrolet Silverado 1500 LS 2005
Chevrolet Silverado 1500 LS 2006
Chevrolet Silverado 1500 LT 1999
Chevrolet Silverado 1500 LT 2000
Chevrolet Silverado 1500 LT 2001
Chevrolet Silverado 1500 LT 2002
Chevrolet Silverado 1500 LT 2003
Chevrolet Silverado 1500 LT 2004
Chevrolet Silverado 1500 LT 2005
Chevrolet Silverado 1500 LT 2006
Chevrolet Silverado 1500 SS 2003
Chevrolet Silverado 1500 SS 2004
Chevrolet Silverado 1500 SS 2005
Chevrolet Silverado 1500 SS 2006
Chevrolet Silverado 1500 WT 2002
Chevrolet Silverado 1500 WT 2003
Chevrolet Silverado 1500 WT 2004
Chevrolet Silverado 1500 WT 2005
Chevrolet Silverado 1500 WT 2006
Chevrolet Silverado 1500 Z71 2004
Chevrolet Silverado 1500 Z71 Off-Road 2005
GMC Sierra 1500 Base 2002
GMC Sierra 1500 Base 2003
GMC Sierra 1500 Base 2004
GMC Sierra 1500 Base 2005
GMC Sierra 1500 C3 2001
GMC Sierra 1500 Denali 2002
GMC Sierra 1500 Denali 2003
GMC Sierra 1500 Denali 2004
GMC Sierra 1500 Denali 2005
GMC Sierra 1500 Denali 2006
GMC Sierra 1500 HT 2002
GMC Sierra 1500 Hybrid 2005
GMC Sierra 1500 Hybrid 2006
GMC Sierra 1500 SL 1999
GMC Sierra 1500 SL 2000
GMC Sierra 1500 SL 2001
GMC Sierra 1500 SL 2002
GMC Sierra 1500 SL 2003
GMC Sierra 1500 SL 2006
GMC Sierra 1500 SLE 1999
GMC Sierra 1500 SLE 2000
GMC Sierra 1500 SLE 2001
GMC Sierra 1500 SLE 2002
GMC Sierra 1500 SLE 2003
GMC Sierra 1500 SLE 2004
GMC Sierra 1500 SLE 2005
GMC Sierra 1500 SLE 2006
GMC Sierra 1500 SLT 1999
GMC Sierra 1500 SLT 2000
GMC Sierra 1500 SLT 2001
GMC Sierra 1500 SLT 2002
GMC Sierra 1500 SLT 2003
GMC Sierra 1500 SLT 2004
GMC Sierra 1500 SLT 2005
GMC Sierra 1500 SLT 2006
GMC Sierra 1500 WT 2002
GMC Sierra 1500 WT 2003
GMC Sierra 1500 WT 2004
GMC Sierra 1500 WT 2005
GMC Sierra 1500 WT 2006