QA1 BW02-GMB4 Level 2 Big Wheel Double Adj Coilover Kit for 1971-1976 GM B-Body

Vehicle Fitment

• 1971-1976 GM B-Body - Chevrolet Caprice, Impala, Bel Air

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 2 kit; QA1 also offers a Level 1 kit (BW01-GMB4) and a Level 3 kit (BW03-GMB4) with QA1 MOD Series shocks for this same 1971-1976 GM B-Body platform

Features

• Complete bolt-in suspension system, including control arms and sway bars - no fabrication required
• Double-adjustable coil-overs on all four corners for independent compression and rebound tuning
• Front ride height adjustable up to 2 in. from stock
• Rear ride height adjustable from stock to up to 5 in. of drop
• Tubular front control arms designed specifically for big wheel applications with corrected suspension geometry
• Adjustable upper and lower rear trailing arms center the axle in the wheel well for big wheel/tire clearance
• Front and rear tubular sway bars reduce body roll and improve stability at raised or lowered ride heights
• Included aluminum spanner wrenches let you dial in exact ride height and squat with the kit fully installed
• 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 2
• Kit Type: Full Vehicle Big Wheel Suspension Kit
• Shock Valving: Double Adjustable (front and rear)
• Coil-Over Springs Included: Yes
• Front Upper/Lower Control Arms Included: Yes
• Adjustable Upper/Lower Rear Trailing Arms Included: Yes
• Front Sway Bar Included: Yes
• Rear Sway Bar Included: Yes
• Mounting Hardware Included: Yes
• Max Wheel Size: Up to 28 in.

Included Components

• 1x Front Pro Coil Double-Adjustable Coil-Over System (GD507-10550C)
• 1x Pair Pro Touring Upper Control Arms (52518)
• 1x Pair Street Lower Control Arms (52721)
• 1x Front Sway Bar Kit (52850)
• 1x Tie Rod Adjuster Sleeve Set (5252)
• 1x Rear Pro Coil Kit, Double-Adjustable Shocks, 250 lb. Springs (RCK52364)
• 1x Pair Adjustable Upper Trailing Arms (5254)
• 1x Pair Adjustable Lower Trailing Arms (5201)
• 1x Rear Sway Bar Kit (52851)
• 1x Thrust Bearing Kit (7888-109)
• 1x Spanner Wrench Kit (T115W)
• 1x Mounting Hardware Kit

Product Description

The QA1 BW02-GMB4 is a complete, bolt-in Level 2 Big Wheel suspension system for 1971-1976 Chevrolet Caprice, Impala, and Bel Air, built to clear wheels up to 28 inches. It steps up from the Level 1 kit by adding double-adjustable coil-overs, tubular front control arms, and front and rear sway bars - giving you independent control over compression and rebound damping along with sharper, more stable handling at any ride height.

Up front, the double-adjustable Pro Coil coil-over system pairs with tubular Pro Touring upper control arms and street lower control arms designed specifically for big wheel geometry, letting you raise or lower the car up to 2 inches from stock while keeping proper alignment and caster. In the rear, a matching double-adjustable Pro Coil kit with 250 lb. springs works alongside adjustable upper and lower trailing arms to re-center the axle in the wheel well, with a rear range from stock height to a full 5 inches of drop. Front and rear tubular sway bars are included to keep body roll in check as the ride height changes.

Every component ships powder coated and ready to install, and the kit includes a thrust bearing kit and aluminum spanner wrench kit so you can dial in your exact stance in minutes, then fine-tune shock compression and rebound independently - useful both for a smoother street ride and for maximizing grip off the line. It's built for donk, box, and bubble-style big wheel builds that want a more complete handling upgrade than the base Level 1 kit offers.