Four Seasons 4178R A/C Compressor Kit

Four Seasons PAC-Kit w/ Reman Compressor 4178R

Four Seasons 4178R is a PAC-Kit w/ Reman Compressor for classic GM and Pontiac A/C service applications. It covers a broad range of 1968-1974 vehicles with A6 compressor setups, including Buick, Chevrolet, Oldsmobile, and Pontiac models.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for HVAC A/C compressor replacement
• Fits A6 compressor applications with 6" diameter pulley or single-groove pulley configurations, depending on vehicle
• Direct fitment coverage for Buick Riviera, Chevrolet Camaro, Chevrolet Corvette, Pontiac Firebird, and other classic models
• Part number 4178R for catalog and fitment lookup
• Supports factory air and expansion valve applications where listed

Fitment Coverage

• Fits 1973-1974 Buick Regal, N/A
• Fits 1970-1974 Chevrolet Nova, N/A
• Fits 1974 Oldsmobile Omega, N/A
• Fits 1973 Chevrolet Malibu, N/A
• Fits 1970-1973 Chevrolet Monte Carlo, N/A
• Fits 1971-1973 Pontiac Bonneville, N/A
• Fits 1971-1973 Pontiac Catalina, N/A
• Fits 1968-1973 Pontiac Firebird, N/A
• Fits 1973 Pontiac Grand Prix, N/A
• Fits 1972 Buick Riviera, N/A
• Fits 1970-1972 Chevrolet Bel Air, N/A
• Fits 1970-1972 Chevrolet Caprice, N/A
• Fits 1968-1972 Chevrolet Corvette, N/A
• Fits 1972 Chevrolet Impala, N/A
• Fits 1971 Buick Riviera, N/A
• Fits 1968-1969 Buick Riviera, N/A
• Fits 1970-1971 Chevrolet Bel Air, N/A
• Fits 1970-1971 Chevrolet El Camino, N/A
• Fits 1970-1971 Chevrolet Impala, N/A
• Fits 1968-1970 Buick Skylark, N/A
• Fits 1968-1970 Chevrolet Camaro, N/A
• Fits 1968-1970 Oldsmobile 98, N/A
• Fits 1968-1970 Oldsmobile Cutlass, N/A
• Fits 1968-1970 Oldsmobile Cutlass Supreme, N/A
• Fits 1968-1970 Oldsmobile Delta 88, N/A
• Fits 1968-1970 Oldsmobile Toronado, N/A
• Fits 1968-1969 Chevrolet Bel Air, N/A
• Fits 1968-1969 Chevrolet Caprice, N/A
• Fits 1968-1969 Chevrolet El Camino, N/A
• Fits 1968-1969 Chevrolet Impala, N/A

What This Part Helps Address

• Loss of A/C compressor function in classic GM and Pontiac vehicles
• Restoration of cabin cooling performance on factory air systems
• Replacement for worn or failing remanufactured compressor assemblies
• Service needs on vehicles using A6 compressor and expansion valve layouts
• Fitment matching for 1968-1974 Chevrolet, Buick, Oldsmobile, and Pontiac A/C systems

Installation Notes

Verify the vehicle’s compressor style, pulley configuration, and listed notes before ordering. This part cross-references 57087 and 33211 for the same application. For best results, confirm the A6 compressor setup and any expansion valve or factory air requirements shown in the fitment data.

Quality Assurance

Four Seasons catalogs this PAC-Kit under part number 4178R for specific classic vehicle applications. Use the fitment notes to match the correct A/C system configuration before installation.