Autolite 86 Spark Plug

Autolite 86 Copper Resistor Spark Plug

Autolite 86 is a copper resistor spark plug built for OE-style service in a wide range of classic Chrysler, Chevrolet, Pontiac, Oldsmobile, Dodge, Cadillac, and Buick applications. It uses a copper center electrode, nickel tip materials, and a 0.035 in. pre-gap to support quick starts, smooth acceleration, and steady ignition performance.

Key Features

• Part number 86 copper resistor spark plug for OE-style replacement
• 0.035 in. pre-gap for many listed Chrysler, Chevrolet, Pontiac, and Dodge applications
• Copper center electrode core with nickel center and ground electrode tip materials
• 4000 ohm resistance and resistor-type design for ignition system noise control
• Ceramic insulator with mid-projection design
• 14.0 mm thread diameter, 0.374 in. reach, flat seat, and 13/16 in. hex

Product Details

The Autolite Copper Resistor Spark Plug line focuses on OE form, fit, and function for foreign and domestic vehicles. Part number 86 follows that approach with a standard center electrode design, tapered ground electrode tip, and stud terminal connection. It is a practical choice for drivers restoring or maintaining older ignition systems that call for a conventional copper plug. This part cross-references NGK 5858 for the same application.

Vehicle Fitment

• Fits 1975-1976 Chrysler New Yorker, N/A
• Fits 1951-1954 Chrysler New Yorker, N/A
• Fits 1975-1976 Chrysler Newport, N/A
• Fits 1961-1964 Chrysler Newport, N/A
• Fits 1951-1954 Chrysler Newport, N/A
• Fits 1975-1976 Chrysler Town & Country, N/A
• Fits 1961-1964 Chrysler Town & Country, N/A
• Fits 1951-1954 Chrysler Town & Country, N/A
• Fits 1973-1974 Oldsmobile 98, N/A
• Fits 1973-1974 Oldsmobile Custom Cruiser, N/A
• Fits 1971-1974 Oldsmobile Cutlass, N/A
• Fits 1971-1974 Oldsmobile Cutlass Supreme, N/A
• Fits 1973-1974 Oldsmobile Delta 88, N/A
• Fits 1971-1974 Oldsmobile Delta 88, N/A
• Fits 1973-1974 Oldsmobile Omega, N/A
• Fits 1973-1974 Oldsmobile Toronado, N/A
• Fits 1971-1972 Oldsmobile 98, N/A
• Fits 1971-1972 Oldsmobile Custom Cruiser, N/A
• Fits 1971-1972 Oldsmobile Toronado, N/A
• Fits 1970-1971 Dodge Challenger, N/A
• Fits 1967-1971 Dodge Charger, N/A
• Fits 1967-1971 Dodge Monaco, N/A
• Fits 1971 Pontiac Acadian, N/A
• Fits 1968-1969 Pontiac Acadian, N/A
• Fits 1964 Pontiac Acadian, N/A
• Fits 1971 Pontiac Bonneville, N/A
• Fits 1957-1968 Pontiac Bonneville, N/A
• Fits 1970-1971 Pontiac Catalina, N/A
• Fits 1955-1968 Pontiac Catalina, N/A
• Fits 1967-1971 Pontiac Firebird, N/A
• Fits 1971 Pontiac Grand Prix, N/A
• Fits 1962-1968 Pontiac Grand Prix, N/A
• Fits 1971 Pontiac GTO, N/A
• Fits 1964-1968 Pontiac GTO, N/A
• Fits 1967-1971 Pontiac Laurentian, N/A
• Fits 1955-1964 Pontiac Laurentian, N/A
• Fits 1971 Pontiac LeMans, N/A
• Fits 1963-1969 Pontiac LeMans, N/A
• Fits 1967-1971 Pontiac Parisienne, N/A
• Fits 1959-1964 Pontiac Parisienne, N/A
• Fits 1970 Chevrolet Bel Air, N/A
• Fits 1955-1964 Chevrolet Bel Air, N/A
• Fits 1950-1953 Chevrolet Bel Air, N/A
• Fits 1969-1970 Chevrolet Camaro, N/A
• Fits 1969-1970 Chevrolet Caprice, N/A
• Fits 1969-1970 Chevrolet Impala, N/A
• Fits 1958-1964 Chevrolet Impala, N/A
• Fits 1970 Chevrolet Monte Carlo, N/A
• Fits 1969-1970 Chevrolet Nova, N/A
• Fits 1970 Oldsmobile 98, N/A
• Fits 1970 Oldsmobile Cutlass, N/A
• Fits 1964-1970 Oldsmobile Cutlass, N/A
• Fits 1961 Oldsmobile Cutlass, N/A
• Fits 1970 Oldsmobile Cutlass Supreme, N/A
• Fits 1970 Oldsmobile Delta 88, N/A
• Fits 1965-1970 Oldsmobile Delta 88, N/A
• Fits 1970 Pontiac Acadian, N/A
• Fits 1969-1970 Pontiac Bonneville, N/A
• Fits 1969-1970 Pontiac Catalina, N/A
• Fits 1969-1970 Pontiac Firebird, N/A
• Fits 1969-1970 Pontiac Grand Prix, N/A
• Fits 1969-1970 Pontiac GTO, N/A
• Fits 1969-1970 Pontiac Laurentian, N/A
• Fits 1969-1970 Pontiac LeMans, N/A
• Fits 1969-1970 Pontiac Parisienne, N/A
• Fits 1969-1970 Pontiac Tempest, N/A
• Fits 1967-1969 Dodge Dart, N/A
• Fits 1967-1969 Oldsmobile Cutlass Supreme, N/A
• Fits 1961-1969 Pontiac Tempest, N/A
• Fits 1964-1967 Chevrolet Malibu, N/A
• Fits 1967 Dodge Charger, N/A
• Fits 1958-1961 Chevrolet Bel Air, N/A
• Fits 1955-1961 Chevrolet Corvette, N/A
• Fits 1958-1961 Chevrolet Impala, N/A
• Fits 1958-1961 Pontiac Laurentian, N/A
• Fits 1959-1961 Pontiac Parisienne, N/A
• Fits 1955-1956 Chrysler 300, N/A
• Fits 1955-1956 Chrysler New Yorker, N/A
• Fits 1955-1956 Chrysler Newport, N/A
• Fits 1955-1956 Chrysler Town & Country, N/A
• Fits 1955-1956 Dodge Lancer, N/A
• Fits 1949-1955 Cadillac Commercial Chassis, N/A
• Fits 1953-1955 Cadillac DeVille, N/A
• Fits 1953-1955 Cadillac Eldorado, N/A
• Fits 1951-1954 Chrysler Imperial, N/A
• Fits 1954 Oldsmobile 88, N/A
• Fits 1950 Oldsmobile 88, N/A
• Fits 1950-1954 Oldsmobile 98, N/A
• Fits 1954 Oldsmobile Starfire, N/A
• Fits 1950-1952 Buick Roadmaster, N/A

Common Uses

• Restoring ignition performance on classic Chrysler, Chevrolet, Pontiac, and Oldsmobile engines
• Addressing hard starts caused by worn or fouled spark plugs
• Improving idle quality and throttle response in OE-style ignition systems
• Replacing plugs that no longer hold the specified gap or fire consistently
• Reducing ignition noise in resistor-equipped applications

Installation Notes

Verify the required gap before installation and confirm the application matches the vehicle’s engine and ignition setup. This plug uses a flat seat, 14.0 mm thread diameter, 0.374 in. reach, and 13/16 in. hex, so matching the original specification is important for proper sealing and combustion chamber clearance. For fitment searches, this part is commonly referenced for 1970 Chevrolet Camaro, 1969-1970 Pontiac GTO, and 1971-1974 Oldsmobile Cutlass applications.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and OE manufacturers, and this copper resistor spark plug follows the brand’s OE-style replacement approach for broad vehicle coverage. Part number 86 is built to meet the listed form, fit, and function requirements for the applications shown.