Control Arms – Buick Grand National 1978-1987 Rear, Upper and Lower

For the 1978-1987 Buick Grand National. Spohn Upper and Lower, Rear Control Arm kits are the ultimate upgrade for the rear suspension on classic 1978-1988 GM G-Body cars. Designed by Spohn Performance, these Upper and Lower Trailing Arm sets are one of the best rear control arm packages available in the market today. Spohn rear control arms outperform factory stamped arms with improved durability, adjustability, geometry and design. When installed you can expect superior handling, traction and stability for your suspension. Made in the U.S.A.

Engineered with precision, Spohn upper, rear trailing arms feature a turnbuckle design that allows for full adjustability without removing the arms from the vehicle. Bolt-on design for an OEM like fitment and easy installation. These are the highest quality, easiest to adjust on the car, rear upper control arms on the market!

Included, Spohn rear, upper arms are equipped with greasable, Del-Sphere rod ends. These Delrin® bushed spherical rod ends absorb shock and road noise so you get the quiet and smooth ride of a bushing as well as 22° of rotation! Designed and manufactured exclusively by Spohn Performance for unmatched ride quality. Adjustable, rear upper arms are machined using TIG welded 4130N chrome moly threaded tube adapters and 1.25 in. x 0.095 in. wall DOM tubing for added strength and performance.

Spohn Del-Sphere pivot joints feature a one piece forged and heat treated 4130 chrome moly housing, a heat treated and chrome plated chrome moly spherical ball, Delrin® bushing cups, heat treated retainer washers and snap ring, external grease fittings, and a zinc coated housing for show stopping finish built to stand up to the elements.

The adjustment range on Spohn upper, rear control arms is: 10.000 inches (closed) and 11.625 inches (open), (*OEM or stock setting for reference is 11.125 inches, open) providing ample flexibility to customize your suspension setup. Factory hardware is retained to attach the arms to the axle and the frame, ensuring easy installation. The adjuster forks feature 1 in.-14 RH threads for precise tuning.

Included Spohn lower, rear control arms are Del-Sphere pivot jointed 4130N chrome moly, tubular and fully adjustable for maximum traction and handling. Lower control arms are: 18.125 inches (closed) and 20.625 inches (open), (*OEM or stock setting for reference is 19.250 inches, open). The adjustability feature allows for the centering of the rear end housing fore and aft to gain proper tire clearance when running larger tires and for proper alignment after lowering your ride height.

*NOTE: These rear lower control arms do not have factory style rear sway bar mounting holes.
*NOTE: Use Aldan American rear sway bar part number A0137 or A0154 with this rear control arm kit

Included Spohn Del-Sphere rear axle housing, spherical pivot joint bushings that allow for full articulation of your rear upper control arms for maximum traction and handling performance. These Del-Sphere pivot joints install easily with a light press fit and are retained by an external snap retaining ring. CNC machined 6061-T6 aluminum housing with a hard clear anodized finish houses Delrin® bushing cups designed for a smooth and self-lubricating operation. Easy tension adjustments using the included adjustment wrench. Spohn Del-Sphere bushings are 100% rebuildable.

If you’re looking for better handling, traction and proper wheel centering on your rear end then this rear control arm package from Spohn Performance is exactly what your GM G-Body needs. Setup your 1978-1988 GM G-Body rear suspension with fully adjustable, rear, upper and lower control arms.

• Kit fits 1978-1988 GM G-Body sedans, station wagons, and El Caminos
• Control Arm Location: Rear, Upper and Lower
• Includes 2 , Adjustable, Upper Control Arms
• Includes 2 , Rear, Lower Control Arms
• Includes 2 Del-Sphere bushings for both sides of the differential housing
• Bolt-on design for factory like fitment and easy installation
• Upper: Fully adjustable design with RH/LH thread turnbuckle for easy fine-tuning
• Upper Adjustment range: Closed – 10.000 in., Open – 11.625 in.
• Upper: Adjuster forks feature 1 in.-14 RH threads for precise tuning
• Upper: Del-Sphere adjuster ends feature 1 in.-14 LH threads for precise tuning
• Upper: 1.25 in. x 0.095 in. wall DOM tubing
• Upper: TIG welded 4130N chrome moly threaded tube adapters
• Lower: Adjustment range: Closed – 18.125 in., Open – 20.625 in.
• Lower: Includes Del-Sphere rod ends with Delrin® bushings for maximum articulation
• NOTE: These rear lower control arms do not have factory style rear sway bar mounting holes
• NOTE: Use Aldan American rear sway bar part number A0137 or A0154
• Del-Sphere bushings provide 22° of travel for enhanced suspension articulation
• Factory hardware is retained to attach arms to the axle and the frame
• Greasable via zerk fittings for improved longevity
• Made in the U.S.A.