UPR HD ™ Double Adjustable Race Uppers set the industry standard for race upper control arms in 1998 and haven't looked back. 1/4" thick Chrome Moly formed boxes with upper and lower gussets to eliminate any flex or unwanted distortion from Ultra High Horsepower Mustangs. The 4130 Chrome Moly threaded adjuster system allows these bars to be fully in car adjustable on the fly or between rounds in the lanes. Billet 6061 aluminum bushings and high strength performance alloy heim joints complete these arms. All of our Suspension Products are made with the Highest Quality materials and most expensive components. We spare no expense on our products and always stand behind them with our Lifetime warranty that no one else offers.
Question: Do I really need adjustable upper control arms?
Answer: It depends on what your intentions are with the car. When you lower a car the pinion angle changes, which can introduce vibrations in the drive shaft and or put the pinion angle out of it's optimal range depending on how much the car is lowered. You can also adjust pinion angle depending on the type of tire you are using at the track
Question: What does double adjustable mean?
Answer: Single adjustable arms have to be unbolted front one end in order to adjusted. Double adjustable means you can adjust the length while the arm is bolted into place.