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Looking for the newly released QA1 Box Suspension? 


  • Adjustable Ride Height
  • Bolt On Components
  • Adjustable Valving to Dial in Ride and Handling
  • Adjustable Rear Control Arms to Recenter Rear Axle
  • Coilover Performance


Fit up to 28” wheels on your Caprice or Impala with a complete bolt-in suspension system. It has everything you need to get your Box sitting right while giving you a better ride.


Single-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. Then adjust your shock valving with the twist of a knob to firm up or soften the ride.


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.


Fitment Notes


  • Kits work with factory housings or Quick Performance 9” rear axles


Quick Performance Housing and Axle Package Available

1977-1990 Impala, Level 1, Big Wheel Kit, Single Adjustable, QA1 BW01-GMB5