Spohn Performance 239B Features:

If you've got a big wheeled Donk, or you're laying in the weeds, then these arms have your name written all over them! Replace the factory rear lower control arms on your 1971-1996 GM B-Body with our extreme duty adjustable units!
Our adjustable tubular rear lower control arms are built to take a beating, provide for serious handling performance, and greatly increase the rear end's fore and aft stability. Eliminate wheel hop, increase traction, and correct rear end alignment after lowering or lifting the ride height with an easy bolt-on installation.
The adjustability feature allows for pushing the rear axle housing back to correct rear end fore/aft centering after lowering or lifting the ride height (must be used with our adjustable rear upper control arms).
Our massive forged 4130 chrome moly 1 in.-12 right hand and left hand threaded CNC machined double male adjusters allow for easy on-the-car adjustments, there's no need to unmount the control arms to make adjustments!
These control arms feature our 100% maintenance-free Vulcan Series extreme-duty vulcanized natural rubber bushings that provide for a ride as smooth and quiet as factory, as well as long term durability.
Technical Notes -
Adjustability Ranges: Center-Center Lengths - OEM: 22.0 in. - Fully Compressed: 21.5 in. - Maximum Extended: 23.5 in.
Rear Sway Bar: These adjustable rear lower control arms have NO PROVISIONS to mount a rear sway bar. Because the arms mount on an angle on the car, any change in length of the arm changes the positioning of the sway bar mounting holes and the rear sway bar will not line up with the holes. If you tried to adjust the length of the control arm with a rear sway bar mounted to the arm it would just bind up. If you want a rear sway bar you will need to use a rear sway bar that mounts to the chassis, not the control arms.
Rear Upper Control Arms: You will need to use Spohn SKU 634 or 635 adjustable rear upper control arms to maintain proper pinion angle.

• 1.50 in. x 0.120 in. wall DOM tubing
• 2.50 in. x 0.25 in. wall DOM bushing housing tubes
• CNC laser cut and formed 3/16 in. thick steel bushing housing gussets top and bottom for maximum strength and durability
• Vulcan Series extreme-duty vulcanized natural rubber bushings
• Massive 1 in.-12 right hand and left hand threaded silver zinc plated forged 4130 chrome moly double male adjusters
• TIG welded 4130 chrome moly threaded tube adapters for maximum thread strength
• Ships fully assembled and jig set at OEM length. Center-Center Lengths - OEM: 22.0 in. - Compressed: 21.5 in. - Extended: 23.5 in.
• Easy 100% bolt-in installation using factory hardware with the use of basic hand tools
• These are the highest quality, easiest to adjust on-the-car rear lower control arms on the market!
• No rear sway bar mounting provisions
• Powder coated for a brilliant and durable finish