SKU: 5247 | UPC: 806990064530
QA1 Upper Adjustable Trailing Arms for 1978-1988 GM G-Body & 1973-1977 GM A-Body
QA1 Upper Adjustable Trailing Arms deliver precise control for 1978-1988 GM G-Body and 1973-1977 GM A-Body vehicles with factory rear end housings. Built from high-strength tubular steel with zinc-plated and anodized finish, they reduce axle flex and suspension bind for improved handling and traction on street or track. On-car adjustability allows quick pinion angle tuning without removal.
Key Features
- Heavy-Duty Construction: High-strength tubular steel with zinc-plated and anodized finish eliminates axle flex and maintains precise alignment for stable handling in daily or performance driving.
- Pinion Angle Adjustment: Double-adjustable aluminum hex design enables on-vehicle tuning by loosening jam nuts, reducing drivetrain wear, wheel hop, and improving traction over fixed arms.
- Reduced Suspension Bind: Spherical ball or rod end assembly with UHMW polyethylene bushings at chassis end and fluted greasable polyurethane bushings at differential end for smoother travel and better tire contact.
- Bolt-In Installation: Direct replacement with all hardware included, no modifications needed for fast setup on compatible GM models.
- Made in USA: Precision engineered in Lakeville, Minnesota, with durable components for long-term reliability.
Product Notes
- Designed for vehicles with factory rear end housings only.
- Grease bushings regularly for peak performance and longevity.
- Package weight 9 lbs. dimensions 20 × 5 × 4 inches.
Installation Notes
- Professional installation recommended.
- Bolt-in design fits directly. no welding or fabrication required.
- Includes all hardware and detailed installation guide.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1973-1977 | Buick | Century | Base |
| 1973-1977 | Buick | Century | Custom |
| 1980-1981 | Buick | Century | Estate |
| 1973-1987 | Buick | Regal | Base |
| 1973-1987 | Buick | Regal | Custom |
| 1987 | Buick | Regal | GNX |
| 1984-1987 | Buick | Regal | Grand National |
| 1973-1977 | Chevrolet | Chevelle | Deluxe |
| 1973-1987 | Chevrolet | El Camino | Base |
| 1973-1987 | Chevrolet | El Camino | SS |
| 1973-1975 | Chevrolet | Laguna | Base |
| 1973-1981 | Chevrolet | Malibu | Base |
| 1973-1988 | Chevrolet | Monte Carlo | Base |
| 1981-1987 | GMC | Caballero | Base |
| 1973-1977 | GMC | Sprint | Base |
| 1973-1987 | Oldsmobile | Cutlass | Base |
| 1973-1981 | Oldsmobile | Cutlass Supreme | Base |
| 1973-1987 | Pontiac | Grand Prix | Base |
| 1973-1981 | Pontiac | LeMans | Base |
| 1978-1987 | Pontiac | Bonneville | Base |
Why Choose QA1?
- Over 40 years in suspension engineering with a focus on performance parts.
- Components built to withstand high-stress track and street use.
- Every part precision-machined for exact fit and function.
Frequently Asked Questions
- Q: Does this fit my 1984 Buick Regal Grand National with factory rear?
A: Yes, designed specifically for 1978-1988 G-Body like Regal Grand National with factory rear end housing. - Q: What materials are used in the bushings and bearings?
A: UHMW polyethylene bushings at chassis end, fluted greasable polyurethane at differential end, with spherical rod ends for low friction. - Q: Is warranty coverage provided?
A: QA1 offers limited lifetime warranty on manufacturing defects. contact manufacturer for details.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure box measuring 20 × 5 × 4 inches
- Weight: 9 lbs
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