The P/N 0058 heavy duty engine mounts for GM G-Body cars takes the place of the heavy factory clamshell mount. It places the Small Block Chevy in exact factory location and uses our popular P/N 90051 solid motor mounts or can be used with the factory rubber mounts. Tough 3/16” laser cut brackets and Grade 8 hardware can handle as much horsepower as you can throw at them. When used with P/N 90051, solid engine mounts improve responsiveness and help prevent engine movement, which can help in tight packaging situations (large header primaries, turbos, etc). Solid engine mounts work best in racing applications and may contribute to increased Noise, Vibration and Harshness. Available in gloss black powder coat. These engine mounts are proudly used on UMI’s G-Body test car, 1979 Monte Carlo “Green Machine”. 100% manufactured, tested and raced out of Philipsburg, PA – USA. Note: Heavy duty engine mounts may not work with Oldsmobile or Pontiac engines.Installation InstructionsThis Part Fits: Year Make Model Submodel 1978-1987 Buick Regal Base 1982-1983 Buick Regal Estate Wagon 1987 Buick Regal GNX 1984-1987 Buick Regal Grand National 1978-1987 Buick Regal Limited 1982 Buick Regal Limited Turbo 1978-1982 Buick Regal Sport 1983-1986 Buick Regal T-Type 1978-1987 Chevrolet El Camino Base 1978,1981-1986 Chevrolet El Camino Conquista 1979-1981 Chevrolet El Camino Royal Knight 1978-1987 Chevrolet El Camino SS 1978-1981 Chevrolet Malibu Base 1978-1983 Chevrolet Malibu Classic 1978-1980 Chevrolet Malibu Classic Estate 1978-1981 Chevrolet Malibu Classic Landau 1979-1980 Chevrolet Malibu Classic Sport 1979-1980 Chevrolet Malibu Estate 1979 Chevrolet Malibu Landau 1979 Chevrolet Malibu Police 1979-1980 Chevrolet Malibu Sport 1979,1981-1988 Chevrolet Monte Carlo Base 1983 Chevrolet Monte Carlo CL 1978-1981 Chevrolet Monte Carlo Landau 1986-1988 Chevrolet Monte Carlo LS 1978,1980 Chevrolet Monte Carlo Sport 1983-1988 Chevrolet Monte Carlo SS 1981-1986 GMC Caballero Amarillo 1978-1987 GMC Caballero Base 1981 GMC Caballero Conquista 1978-1987 GMC Caballero Diablo 1978-1980 GMC Caballero Laredo 1981 GMC Caballero Royal Knight 1980 Oldsmobile Cutlass Base 1980-1981 Oldsmobile Cutlass Brougham 1980-1981 Oldsmobile Cutlass LS 1978-1979 Oldsmobile Cutlass Vista Cruiser 1979 Oldsmobile Cutlass Vista Cruiser Brougham 1978-1984 Oldsmobile Cutlass Calais Base 1983-1984 Oldsmobile Cutlass Calais Hurst 1982-1983,1988 Oldsmobile Cutlass Ciera Base 1982-1988 Oldsmobile Cutlass Ciera Brougham 1984-1985 Oldsmobile Cutlass Ciera Cruiser LS 1983,1985-1986 Oldsmobile Cutlass Ciera ES 1985-1987 Oldsmobile Cutlass Ciera GT 1985-1986 Oldsmobile Cutlass Ciera Holiday 1988 Oldsmobile Cutlass Ciera International 1982-1988 Oldsmobile Cutlass Ciera LS 1986-1988 Oldsmobile Cutlass Ciera S 1986-1988 Oldsmobile Cutlass Ciera SL 1980-1983 Oldsmobile Cutlass Cruiser Base 1980-1981 Oldsmobile Cutlass Cruiser Brougham 1978-1979,1985-1986 Oldsmobile Cutlass Salon 442 1978-1980,1985-1987 Oldsmobile Cutlass Salon Base 1978-1980 Oldsmobile Cutlass Salon Brougham 1979 Oldsmobile Cutlass Salon Hurst 1987 Oldsmobile Cutlass Supreme 442 1978-1988 Oldsmobile Cutlass Supreme Base 1978-1987 Oldsmobile Cutlass Supreme Brougham 1988 Oldsmobile Cutlass Supreme Classic 1988 Oldsmobile Cutlass Supreme Classic Brougham 1988 Oldsmobile Cutlass Supreme Indy 500 Pace Car 1988 Oldsmobile Cutlass Supreme International 1981,1985 Oldsmobile Cutlass Supreme LS 1988 Oldsmobile Cutlass Supreme SL 1982-1986 Pontiac Bonneville Base 1982-1986 Pontiac Bonneville Brougham 1984-1986 Pontiac Bonneville LE 1978-1987 Pontiac Grand Prix Base 1981-1987 Pontiac Grand Prix Brougham 1984-1987 Pontiac Grand Prix LE 1978-1983 Pontiac Grand Prix LJ 1978-1980 Pontiac Grand Prix SJ