At the core is a lightweight carbon fiber center section—strong
Designed to eliminate the articulation issues of the stock setup while improving stability
All GP-X spindles are assembled using premium ARP fasteners
Want to take your A-body’s rear suspension to the next level
the GP-X Series is where brilliance becomes reality
1968-1972 A-Body Front Upper Control Arms - GP-R GM At the core is aUpgrade Your Chevelle, GTO, Skylark, or Cutlass With Our A Body Upper Control Arms GP R Series If you're driving a 19681972 GM A body like a Chevelle, GTO, Cutlass, or Skylark, you know the factory front suspension has limitations when it comes to serious performance driving. Our GP R Series upper control arms are engineered to fix that. Designed for racers and hardcore enthusiasts, these arms optimize suspension geometry for improved handling,