QA1 78 88 GM G Body 73 77 A Body Upper Non Adjustable Tubular Trailing Arms : :. All upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. This keeps the tires planted firmly on the ground for improved traction and a more predictable, better handling car. For a long lasting finish, tubular and boxed trailing arms are powder coated gloss black, while the adjustable arms are zinc plated and anodized. Boxed Trailing Arms are constructed from 0. 120'' wall cold rolled steel tubing for maximum strength and flex elimination. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Tubular Trailing Arms are constructed from 1 1 4'' diameter, 0. 120'' wall steel tubing which offers increased strength over other designs, but also have the added advantage of lighter weight. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Heavy Duty Adjustable Trailing Arms allow easy rear suspension adjustments for optimum handling and traction. Simply loosen the jam nuts and adjust the pinion angle without removing the arms from the vehicle. They replace soft OE differential bushings with polyurethane differential bushings, and they use a spherical ball or rod end assembly with UHMW polyethylene bushings on the chassis end to allow the rear suspension to move more freely and eliminate bushing bind. All parts sold in pairs. This Part Fits: Year Make Model Submodel 1973 1977,1980 1981 Buick Century Base 1975 1979,1982 1988 Buick Century Custom 1980 1981,1984 Buick Century Estate 1985 1988 Buick Century Estate Wagon 1976 Buick Century Indianapolis 500 Pace Car 1978 1988 Buick Century Limited 1973 1975 Buick Century Luxus 1984 Buick Century Olympia Limited 1975 1979 Buick Century Special 1978 1981 Buick Century Sport 1983 1986 Buick Century T Type 1973 1987 Buick Regal Base 1988 Buick Regal Custom 1982 1983 Buick Regal Estate Wagon 1987 Buick Regal GNX 1984 1987 Buick Regal Grand National 1978 1988 Buick Regal Limited 1982 Buick Regal Limited Turbo 1978 1982 Buick Regal Sport 1976 1977 Buick Regal SR 1983 1986 Buick Regal T Type 1973 Chevrolet Chevelle Deluxe 1973 1987 Chevrolet El Camino Base 1975 1977 Chevrolet El Camino Classic 1977 1978,1981 1986 Chevrolet El Camino Conquista 1973 1974 Chevrolet El Camino Custom 1979 1981 Chevrolet El Camino Royal Knight 1973 1987 Chevrolet El Camino SS 1973 1975 Chevrolet Laguna Base 1973 Chevrolet Laguna Estate 1975 1976 Chevrolet Laguna S3 1974 Chevrolet Laguna Type S 3 1973 1981 Chevrolet Malibu Base 1974 1982 Chevrolet Malibu Classic 1975 1976,1978 1980 Chevrolet Malibu Classic Estate 1976 1981 Chevrolet Malibu Classic Landau 1977,1979 1980 Chevrolet Malibu Classic Sport 1973 1974,1979 1980 Chevrolet Malibu Estate 1976,1979 Chevrolet Malibu Landau 1979 Chevrolet Malibu Police 1977,1979 1980 Chevrolet Malibu Sport 1973 1974,1979,1981 1988 Chevrolet Monte Carlo Base 1983 Chevrolet Monte Carlo CL 1973 1974,1976,1978 1981 Chevrolet Monte Carlo Landau 1986 1988 Chevrolet Monte Carlo LS 1973,1975 1977 Chevrolet Monte Carlo S 1978,1980 Chevrolet Monte Carlo Sport 1983 1988 Chevrolet Monte Carlo SS 1981 1986 GMC Caballero Amarillo 1981 1987 GMC Caballero Base 1981 GMC Caballero Conquista 1981 1987 GMC Caballero Diablo 1981 GMC Caballero Royal Knight 1973 1977 GMC Sprint Base 1975 1977 GMC Sprint Classic 1973 1974 GMC Sprint Custom 1975 GMC Sprint High Sierra 1976 GMC Sprint Sierra Madre Del Sur 1975 1976 GMC Sprint SP 1975,1977 Oldsmobile Cutlass 442 1973 1975,1980 Oldsmobile Cutlass Base 1980 1981 Oldsmobile Cutlass Brougham 1977 Oldsmobile Cutlass Colonnade 1976 1977 Oldsmobile Cutlass Colonnade S 1980 1981 Oldsmobile Cutlass LS 1973 1977 Oldsmobile Cutlass S 1976 1979 Oldsmobile Cutlass Vista Cruiser 1979 Oldsmobile Cutlass Vista Cruiser Brougham 1973 1981 Oldsmobile Cutlass Supreme Base 1977 1981 Oldsmobile Cutlass Supreme Brougham 1976 1977 Oldsmobile Cutlass Supreme Colonnade 1974 1975 Oldsmobile Cutlass Supreme Cruiser 1975 Oldsmobile Cutlass Supreme Hurst 1981 Oldsmobile Cutlass Supreme LS 1978 1987 Pontiac Bonneville Base 1978 1986 Pontiac Bonneville Brougham 1984 1987 Pontiac Bonneville LE 1978 1981 Pontiac Bonneville Safari 1973 1975,1978 1980 Pontiac Grand Am Base 1973 1974,1976 1987 Pontiac Grand Prix Base 1981 1987 Pontiac Grand Prix Brougham 1984 1987 Pontiac Grand Prix LE 1975,1977 1983 Pontiac Grand Prix LJ 1975 1980 Pontiac Grand Prix SJ 1973 1981 Pontiac LeMans Base 1973 1974 Pontiac LeMans Luxury 1973 1975,1977 1981 Pontiac LeMans Safari 1974 Pontiac LeMans Safari Luxury 1973 1977 Pontiac LeMans Sport