Big Wheel Box Suspension Kits, 77-90 GM B Body, Caprice, Impala

Fit up to 28” wheels on your Caprice or Impala with a complete bolt-in suspension system, including control arms and sway bars. These kits have everything you need to get your Box sitting right while giving you a better ride and improved handling. Choose from three levels of performance to build your car your way.

All kits include:

Adjustable Coil-Overs

Get the perfect look by easily adjusting your ride height with front and rear coil-overs. Raise or lower your car by up to 2" in the front. Raise your car 0.5” above stock ride height or up to 2" lower than stock in the rear. Dial in the exact style you want in minutes with the included spanner wrench.

• Level 1 kits include Single Adjustable Shocks
• Level 2 kits include Double Adjustable Shocks
• Level 3 Kits include MOD Series Shocks 

Adjustable Upper and Lower Trailing Arms

Get your wheel and tire package to fit with adjustable trailing arms that center your rear axle in the wheel well. This gives you more clearance for up to 28” wheels.

Easy, Bolt-In Installation

Parts come powder coated and ready to install with all necessary hardware. You can bolt up the kit right in your garage or work with your local shop.

Level 2 & 3 Kits Include:

Tubular Control Arms

Upgrade your front-end geometry for better drivability. These arms are designed specifically for big wheel cars with corrected suspension angles for large wheels and tires. They much are lighter and stronger than stock to get the most out of your car.

Tubular Sway Bars

Reduce body roll and improve stability with front and rear sway bars. They help reduce handling issues that come from big wheels and raised ride heights.  

Fitment Notes

• Kits are designed to work with factory rear axle housings

Product Specs

Brand: QA1
Part Type: Suspension Kit
Product Line: Big Wheel Suspension Kits
Rear Coil Springs Included: Yes
Front Shocks Included: Yes
Front Shock Type: Adjustable coilover
Rear Shocks Included: Yes
Rear Shock Type: Adjustable coilover
Sway Bars Included: Level 2 & 3
Front Sway Bar Type: Tubular
Front Sway Bar Diameter (in.): 1.375 in.
Front Sway Bar Finish: Powdercoated Black
Rear Sway Bar Type: Tubular
Rear Sway Bar Diameter (in.):1.250 in.
Rear Sway Bar Finish: Powdercoated Black
Tie Rod Sleeves Included: Yes
Upper Rear Trailing Arms Included: Yes
Upper Rear Trailing Arms Style: Adjustable
Lower Rear Trailing Arms Included: Yes
Lower Rear Trailing Arms Type: Adjustable
Upper Control Arms Included: Level 2 & 3
Lower Control Arms Included: Level 2 & 3
Control Arm Style: Tubular
Control Arm Material: Steel
Control Arm Finish: Powdercoated Black
Thrust Bearings Included: Yes
Coilover Adjustment Wrenches Included: Yes
Quantity: Kit