# UMI Performance 64-72 A-Body Tubular Front Upper A-arms 1/2in Taller Ball Joints Improve handling and make your classic A-Body feel like a modern day muscle car by combining our popular P/N 4033 upper a-arms with ½" taller premium ball joints. P/N 4033-1 a-arms combine the benefit of additional caster with increased negative camber potential throughout the suspension travel. The relocated ball joint plate offers up to six degrees caster without excessive shimming while the ½" taller ball joint creates up to one additional degree negative camber at full bump travel. Expect improved steering feel courtesy of increased caster and an overall increase in lateral grip due to the camber improvement. Features include greaseable, low deflection UMI designed and manufactured Delrin bushings, CrMo cross shafts, improved header clearance and polyurethane bump stops. These track-tested, jig built DOM A-arms are supplied with a durable gloss red or black powder coat finish which guarantees your performance parts stay beautiful on your street car, drag car, autocrosser or Pro-touring machine. Designed and manufactured with pride in Philipsburg, PA - USA. 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:** 988.01 CAD - **Vendor:** UMI Performance - **Type:** Control Arms ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 988.01 CAD | In stock | ## Images - Photo - Primary --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/umi-performance-64-72-a-body-tubular-front-upper-a-arms-1-2in-taller-ball-joints) > Updated: 2026-07-01