# UMI Performance 64-72 A-Body Boxed Lower Control Arms- Poly/Roto-Joint UMI's boxed lower control arms utilize our Roto-Joint technology for a bind free performance and quiet comfortable ride quality. The boxed control arms are fabricated from 0.120" wall thickness rectangular tubing, CNC machined drawn over mandrel bushing holders and MIG welded end caps to keep out unwanted road debris. Each control arm features the correct provisions for adding a stock or aftermarket rear sway bar, sway bar holes are reinforced with a 0.120" wall thickness steel sleeve that is TIG welded and sanded into place. The solid construction combined with the delrin lined Roto-Joints eliminate control arm flex and bushing deflection for improved traction and reduced wheel hop. The installed Roto-Joint is a pivot ball lined with a greaseable delrin race designed to offer 28 degrees of total unrestricted movement, more than adequate for a bind free, low friction operation. The Roto-Joint design improves performance over the factory rubber and aftermarket polyurethane bushings by allowing the suspension to articulate correctly, and provide precision handling. The installed UMI Roto-Joint allows rear end free movement when high handling, auto cross or road race is a concern while still being a 100% streetable setup. The installed delrin race, which lines the spherical ball, absorbs shock and road noise for a quiet and smooth operation on any street or track driven vehicle. This control arm set features polyurethane bushings on one end and UMI's swivel Roto-Joint on the other end. This set-up is designed for street performance and street enthusiast. The polyurethane bushing end is designed to be bolted to the vehicle chassis side while the Roto-Joint attaches to the rear end side. Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger compartment of the vehicle. This Part Fits: Year Make Model Submodel 1965-1967 Buick Gran Sport Base 1970-1972 Buick GS Base 1968-1969 Buick GS 350 Base 1968-1969 Buick GS 400 Base 1970-1972 Buick GS 455 Base 1970 Buick GS 455 GSX 1970,1972 Buick Skylark 350 1964-1972 Buick Skylark Base 1968-1972 Buick Skylark Custom 1964-1969 Buick Special Base 1964-1967 Buick Special Deluxe 1964-1972 Buick Sportwagon Base 1966,1968-1969 Buick Sportwagon Custom 1964-1968 Chevrolet Chevelle 300 1965-1969 Chevrolet Chevelle 300 Deluxe 1970-1972 Chevrolet Chevelle Base 1967-1972 Chevrolet Chevelle Concours 1969-1972 Chevrolet Chevelle Concours Estate 1969-1972 Chevrolet Chevelle Greenbrier 1971-1972 Chevrolet Chevelle Heavy Chevy 1964-1972 Chevrolet Chevelle Malibu 1964-1965 Chevrolet Chevelle Malibu Super Sport 1968-1972 Chevrolet Chevelle Nomad 1968 Chevrolet Chevelle Nomad Custom 1971-1972 Chevrolet Chevelle SS 1967-1970 Chevrolet Chevelle SS 396 1970 Chevrolet Chevelle SS 454 1966 Chevrolet Chevelle Super Sport 396 1964-1972 Chevrolet El Camino Base 1968-1972 Chevrolet El Camino Custom 1968-1972 Chevrolet El Camino SS 1970-1972 Chevrolet Monte Carlo Base 1971-1972 GMC Sprint Base 1972 GMC Sprint Custom 1964-1971 Oldsmobile 442 Base 1964-1972 Oldsmobile Cutlass Base 1972 Oldsmobile Cutlass Cruiser 1964-1967 Oldsmobile Cutlass Holiday 1968,1971-1972 Oldsmobile Cutlass S 1967 Oldsmobile Cutlass Turnpike Cruiser 1964-1972 Oldsmobile Vista Cruiser Base 1964-1967 Oldsmobile Vista Cruiser Custom 1969-1972 Pontiac Grand Prix Base 1964-1972 Pontiac GTO Base 1970-1971 Pontiac GTO The Judge 1964-1972 Pontiac LeMans Base 1972 Pontiac LeMans Luxury 1969-1970 Pontiac LeMans Safari 1970-1972 Pontiac LeMans Sport 1971 Pontiac LeMans T37 1964-1970 Pontiac Tempest Base 1964-1969 Pontiac Tempest Custom 1970 Pontiac Tempest GT 1964-1969 Pontiac Tempest Safari ## Details - **Price:** 518.79 CAD - **Vendor:** UMI Performance - **Type:** Control Arms ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 518.79 CAD | In stock | ## Images - Photo - Primary - User 2 - User 1 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/umi-performance-64-72-a-body-boxed-lower-control-arms-poly-roto-joint-1) > Updated: 2026-07-01