QA1 BW01-GMB5 Level 1 Big Wheel Kit for 1977-1990 Chevy Caprice/Impala

Vehicle Fitment

• 1977-1990 GM B-Body - Chevrolet Caprice, Impala

Fitment Notes

• Works with original factory rear axle housings or Quick Performance 9 in. rear axle housings
• Fits up to 28 in. wheels
• This is the Level 1 kit; QA1 also offers Level 2 (BW02-GMB5) and Level 3 (BW03-GMB5) kits with additional upgrades for this same platform

Features

• Complete bolt-in suspension system - no fabrication required
• Single-adjustable coil-overs on all four corners for tunable ride height and damping
• Front ride height adjustable up to 2 in. higher or lower than stock
• Rear ride height adjustable from 0.5 in. above stock to 2 in. lower than stock
• Adjustable upper and lower rear trailing arms center the axle in the wheel well for big wheel/tire clearance
• Shock valving adjusts with a simple twist of a knob to firm up or soften the ride
• Included spanner wrench kit allows quick, tool-assisted ride height changes
• Parts arrive powder coated and ready to install with all necessary hardware
• Backed by QA1's 1-year warranty against manufacturer defects

Specifications

• Performance Level: Level 1
• Kit Type: Full Vehicle Big Wheel Suspension Kit
• Shock Valving: Single Adjustable (front and rear)
• Coil-Over Springs Included: Yes
• Adjustable Upper/Lower Trailing Arms Included: Yes
• Front Sway Bar Included: No
• Rear Sway Bar Included: No
• Front Upper/Lower Control Arms Included: No
• Mounting Hardware Included: Yes
• Max Wheel Size: Up to 28 in.

Included Components

• 1x Front Pro Coil Single-Adjustable Coil-Over System (GS507-10450C)
• 1x Tie Rod Adjuster Sleeve Set (5252)
• 1x Rear Pro Coil Kit, Single-Adjustable Shocks (RCK52384)
• 1x Pair Adjustable Upper Trailing Arms (5254)
• 1x Pair Adjustable Lower Trailing Arms (5201)
• 1x Thrust Bearing Kit (7888-109)
• 1x Spanner Wrench Kit (T115W)
• 1x Mounting Hardware Kit

Product Description

The QA1 BW01-GMB5 is a complete, bolt-in Level 1 Big Wheel suspension system for 1977-1990 Chevrolet Caprice and Impala. Built to clear wheels up to 28 inches, it replaces the factory suspension on all four corners with single-adjustable coil-overs, giving you independent control over ride height and damping without cutting, welding, or fabrication.

Up front, the QA1 Pro Coil single-adjustable coil-over system lets you raise or lower the car up to 2 inches from stock, paired with tie rod adjuster sleeves for proper alignment after the ride height change. In the rear, a matching single-adjustable Pro Coil kit works alongside adjustable upper and lower trailing arms that re-center the axle in the wheel well - critical for tucking large-diameter wheels correctly - with a rear range from 0.5 inch above stock to 2 inches lower than stock.

Every component ships powder coated and ready to install, and the kit includes a thrust bearing kit and spanner wrench kit so you can dial in your exact stance in minutes, then fine-tune shock firmness with a twist of the adjustment knob. It's built for donk, box, and bubble-style big wheel builds where a clean, adjustable stance and a smoother ride matter as much as the look.