Upgrade Your Chevelle, GTO, Skylark, or Cutlass With Our A-Body Upper Control Arms – GP-R Series

If you're driving a 1968–1972 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, sharper steering response, and increased front-end grip. Built from TIG-welded 4130 chromoly, they’re lightweight, exceptionally strong, and ready for anything from canyon carving to full-on competition.

Race-Ready Geometry. Competition Proven Performance.

The GP-R upper control arms deliver key geometry improvements by increasing positive caster, enhancing camber gain, and raising front roll center height. The result is quicker turn-in, better mid-corner grip, and improved stability under hard braking and cornering. Precision CNC-machined ball joint cups ensure perfect fitment and alignment, while rod ends provide low-friction articulation and allow for overall arm length adjustment, so you can fine-tune your alignment setup and suspension geometry even further.

Quick-Set Caster Adjustment – No Shims Required

Equipped with our Quick-Set cross shaft, these arms make caster adjustments faster and more precise than ever. Indexed slugs let you adjust caster without affecting the rest of the suspension geometry—something that just isn’t possible with traditional alignment shims.

Choose the Right Ball Joints for Your Build

Our GP-R Series upper control arms are available with your choice of Proforged or Howe ball joints to suit your specific application:

• Proforged – Ideal for street-driven cars and light performance use.

• Howe – Designed for autocross, road racing, and demanding track environments.

You can also choose from three ball joint heights to match your front suspension setup:

• Stock Height – Recommended for use with tall aftermarket spindles.

• +.5" or +.9" Tall – Best suited for use with factory-height spindles to improve camber gain and roll center height.

Not sure which combination is right for your build?
We're here to help—contact us anytime and we'll make sure you get the right setup for your goals.

Part of Our GP-R Series – Engineered for Track and Street

These upper control arms are part of our GP-R Series, our no-compromise performance line engineered for aggressive driving, pro-touring builds, time attack, and autocross competition. Whether you're carving corners or building a show-worthy machine that drives as good as it looks, GP-R arms deliver strength, adjustability, and confidence.

Complete Your Front Suspension Overhaul

Pair these upper control arms with other GP-R components to unlock the full potential of your A-body chassis:

• GP-R Lower Control Arms – Add strength and precision to your front end.

• GP-X Drop Spindle – Maximize front end geometry and give your A/F/X body an aggressive stance.

• GP-R Front Sway Bar – Reduce body roll and improve transitional response.

All of our products are built to order with expert craftsmanship and precision manufacturing. Please allow 1–2 weeks for production and shipping.