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Build a properly matched suspension or steering setup with this QA1 chassis bracing. Manufacturer part number 5285 is offered in the listed 78-88 GM A/G-Body Adjustable Rear Frame Support configuration, so vehicle application, mounting position, dimensions, spring rate, adjustment range, and all notes must be confirmed before ordering.
Key Features
- Heavy-Duty Construction: Built from 1-inch diameter cold rolled steel tubing for maximum strength and durability under high-performance conditions.
- Adjustable Preload: Zinc plated threaded sleeves allow precise preload adjustments on rear trailing arm mounts after installation for custom suspension tuning.
- Complete Hardware Kit: All necessary bolts nuts and fasteners included for bolt-on installation without additional parts.
- Muffler Clearance: Engineered to fit without interference alongside stock exhaust systems or popular aftermarket mufflers.
- Chassis Reinforcement: Targets critical flex points to maintain geometry enhance stability and improve cornering and launch traction.
- Direct bolt-on design uses factory mounting locations.
Fitment
| Years | Make | Model | Submodel or Application |
|---|---|---|---|
| 1978-1987 | Buick | Regal | All listed configurations unless otherwise noted |
| 1988 | Buick | Regal | Custom |
| 1982-1983 | Buick | Regal | Estate Wagon |
| 1987 | Buick | Regal | GNX |
| 1984-1987 | Buick | Regal | Grand National |
| 1978-1988 | Buick | Regal | Limited |
| 1982 | Buick | Regal | Limited Turbo |
| 1978-1982 | Buick | Regal | Sport |
| 1983-1986 | Buick | Regal | T-Type |
| 1978-1987 | Chevrolet | El Camino | All listed configurations unless otherwise noted |
| 1978 | Chevrolet | El Camino | Conquista |
| 1981-1986 | Chevrolet | El Camino | Conquista |
| 1979-1981 | Chevrolet | El Camino | Royal Knight |
| 1978-1987 | Chevrolet | El Camino | SS |
| 1978-1981 | Chevrolet | Malibu | All listed configurations unless otherwise noted |
| 1978-1982 | Chevrolet | Malibu | Classic |
| 1978-1980 | Chevrolet | Malibu | Classic Estate |
| 1978-1981 | Chevrolet | Malibu | Classic Landau |
| 1979-1980 | Chevrolet | Malibu | Classic Sport |
| 1979-1980 | Chevrolet | Malibu | Estate |
| 1979 | Chevrolet | Malibu | Landau |
| 1979 | Chevrolet | Malibu | Police |
| 1979-1980 | Chevrolet | Malibu | Sport |
| 1979 | Chevrolet | Monte Carlo | All listed configurations unless otherwise noted |
| 1981-1988 | Chevrolet | Monte Carlo | All listed configurations unless otherwise noted |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1978-1981 | Chevrolet | Monte Carlo | Landau |
| 1986-1988 | Chevrolet | Monte Carlo | LS |
| 1978 | Chevrolet | Monte Carlo | Sport |
| 1980 | Chevrolet | Monte Carlo | Sport |
| 1983-1988 | Chevrolet | Monte Carlo | SS |
| 1981-1987 | GMC | Caballero | All listed configurations unless otherwise noted |
| 1981-1986 | GMC | Caballero | Amarillo |
| 1981 | GMC | Caballero | Conquista |
| 1981-1987 | GMC | Caballero | Diablo |
| 1981 | GMC | Caballero | Royal Knight |
| 1980 | Oldsmobile | Cutlass | All listed configurations unless otherwise noted |
| 1980-1981 | Oldsmobile | Cutlass | Brougham |
| 1980-1981 | Oldsmobile | Cutlass | LS |
| 1978-1979 | Oldsmobile | Cutlass | Vista Cruiser |
| 1979 | Oldsmobile | Cutlass | Vista Cruiser Brougham |
| 1978-1987 | Pontiac | Bonneville | All listed configurations unless otherwise noted |
| 1978-1986 | Pontiac | Bonneville | Brougham |
| 1984-1987 | Pontiac | Bonneville | LE |
| 1978-1981 | Pontiac | Bonneville | Safari |
| 1978-1980 | Pontiac | Grand Am | All listed configurations unless otherwise noted |
| 1978-1987 | Pontiac | Grand Prix | All listed configurations unless otherwise noted |
| 1981-1987 | Pontiac | Grand Prix | Brougham |
| 1984-1987 | Pontiac | Grand Prix | LE |
| 1978-1983 | Pontiac | Grand Prix | LJ |
| 1978-1980 | Pontiac | Grand Prix | SJ |
| 1978-1981 | Pontiac | LeMans | All listed configurations unless otherwise noted |
| 1978-1981 | Pontiac | LeMans | Safari |
Confirm chassis configuration, suspension position, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 application note.
Specifications
| Brand | QA1 |
|---|---|
| Manufacturer Part Number | 5285 |
| Product Type | Chassis Bracing |
| Listed Configuration | 78-88 GM A/G-Body Adjustable Rear Frame Support |
| Compatibility Basis | Vehicle Specific |
| Condition | New |
What's Included
One new QA1 chassis bracing identified by manufacturer part number 5285, with only the components and hardware supplied by QA1 for that exact part number.
About QA1
QA1 develops suspension, steering, driveline, rod-end, bearing, spring, and chassis components for street, performance, racing, restoration, and custom vehicle applications.
Related QA1 Products
- Shop all QA1 products
- QA1 64-67 GM A-Body Non-Adjustable Rear Frame Support
- QA1 68-72 GM A-Body Adjustable Rear Frame Support
- QA1 68-72 GM A-Body Non-Adjustable Rear Frame Support
Frequently Asked Questions
Will QA1 5285 fit my 1978-1987 Buick Regal?
Match the complete fitment row, then verify mounting position, suspension configuration, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 note.
What measurements matter when ordering QA1 5285?
Verify the dimensions and interfaces named in this listing, including thread size and direction, extended and compressed length, bore, spring dimensions or rate, mounting style, and available clearance as applicable.
Does QA1 5285 require setup after installation?
Suspension and steering work commonly requires torque verification, clearance and travel checks, ride-height or damping setup when adjustable, and a professional alignment before road use.
Installation
Follow the current QA1 instructions for this exact part number. Support the vehicle safely, compare every component before disassembly, use the specified hardware and torque values, verify thread engagement and mounting orientation, cycle the suspension through its operating range, check brake and wheel clearance, and complete an alignment when the installation changes suspension or steering geometry.
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