Launching harder, reducing wheel hop, and adding cornering consistency to your 1968-1972 GM A-body is easy with upper control arms from BMR's suspension. Stock control arms with soft rubber bushings deflect under load and absorb power instead of transferring it to the tires. BMRs polyurethane, on-car adjustable tubular control arms for A-bodies (UTCA004) are manufactured from heavy-duty 1 5/8 inch, 0.120-inch wall DOM steel tubing. This design gives you a strong control arm that greatly improves performance. Two-inch greasable, 95-durometer bushings add a solid, more responsive feel over the stock rubber bushings. BMRs bushings are internally fluted, which keeps grease in the bushing, even under heavy load. These flutes also direct grease to the outer edge of the bushing, keeping the thrust surface lubricated. This efficient lubrication ensures quiet, reliable operation over the life of the bushings.BMR's suspension designed the UTCA004 to work well in street performance, drag race, and road race applications. The stock control arms flex under even light cornering loads giving you inconsistent handling characteristics.