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QA1 78-88 GM G-Body/73-77 A-Body Upper Adjustable Trailing Arms - Primary
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QA1 78-88 GM G-Body/73-77 A-Body Upper Adjustable Trailing Arms

QA1
QAP5247
806990064530
Control Arms
2 Units In Stock - Ships Next Business Day
$ 415.38 $ 374.95
$ 374.95

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

Request For Information

Have questions about QA1 78-88 GM G-Body/73-77 A-Body Upper Adjustable Trailing Arms? Fill out the form below and we'll get back to you by the next business day.
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