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Lowest Price GuaranteeSpark Plug1950-1962 Chevy Bel Air; 1952-1959 DeSoto Firedome; 1953-1958 Buick Roadmaster/Super; 1953-1957 Chevy One-Fifty Series/Two-Ten Series Hex Size: 20.62 MM Sold Individually
ACDelco R43S Spark Plug is designed as an application-specific service replacement that supports proper fit, function, and system integration. Delivers the ignition spark required to initiate combustion in the engine cylinder. Verify vehicle fitment and system configuration before installation.
ACDelco R43S Features:
- Application-specific heat range, reach, and terminal configuration should be matched to the specified vehicle application
- Application-specific replacement spark plug for compatible engines
ACDelco R43S Fitment:
- 1950-1962 Chevy Bel Air
- 1952-1959 DeSoto Firedome
- 1953-1958 Buick Roadmaster/Super
- 1953-1957 Chevy One-Fifty Series/Two-Ten Series
- 1953-1954 Cunningham Continental
- 1954-1958 Buick Century/Special
- 1954 Buick Skylark
- 1954-1955 Facel Vega FV/FV1
- 1955-1960 Dodge Truck
- 1955-1961 DeSoto Fireflite
- 1955-1956 Chevy Sedan Delivery/Truck & Oldsmobile Deluxe 88
- 1955 Chevy Corvette
- 1955-1958 Darrin Darrin
- 1955-1970 Oldsmobile 98
- 1955-1964 Oldsmobile Super 88
- 1955-1957 Oldsmobile 88/Starfire
- 1956 Dodge Texan
- 1956-1959 Dodge Royal/Sierra
- 1956-1961 DeSoto Adventurer
- 1956-1964 Cadillac Series 60 Fleetwood/Series 62/Series 75 Fleetwood
- 1956-1967 Cadillac Commercial Chassis/DeVille/Eldorado
- 1956-1958 Facel Vega FVS
- 1956-1957 International S110/S112/S120/S122/S130/S132
- 1957-1971 Chrysler 300
- 1957-1975 Chrysler Newport
- 1957-1974 Chrysler Town & Country
- 1957-1961 Chrysler Windsor & Dodge Custom
- 1957-1960 Chrysler Saratoga & International AM132
- 1957-1958 Chevy Del Ray & Dodge Suburban & International A100 Truck/A102/A110/A112/A120/A122/A130/A132
- 1957-1959 DeSoto Firesweep & Dodge Coronet/Lancer
- 1957-1963 Vauxhall Victor
- 1957 International S100/S102/SA120/SA122/SM120/SM122/SM130/SM132 & Oldsmobile Golden Rocket 88
- 1957-1964 Oldsmobile Fiesta
- 1957-1965 International AB120/AM120/AM130
- 1958-1974 Chrysler New Yorker
- 1958-1961 Chevy Nomad & Plymouth Custom/Suburban
- 1958-1970 Plymouth Belvedere
- 1958 Buick Limited & Cadillac Series 70 Fleetwood Eldorado & Chevy Yeoman & Plymouth Plaza
- 1958-1964 Plymouth Savoy
- 1958-1978 Plymouth Fury
- 1958-1962 Chevy Biscayne/Impala
- 1958-1960 Facel Vega Excellence
- 1958-1966 Oldsmobile Dynamic 88
- 1959-1975 Chrysler Imperial
- 1959-1963 Buick Invicta
- 1959-1966 Buick Electra
- 1959-1964 Buick Estate Wagon
- 1959-1967 Buick LeSabre
- 1959-1961 Chevy Brookwood/Kingswood/Parkwood & Facel Vega HK500
- 1959-1960 Chevy El Camino & International B100/B102/B110/B112/B120/B122/B130/B132
- 1960-1965 Fargo F100 Panel Delivery/F100 Pickup/FW100 Panel Delivery/FW100 Pickup & GMC 1000 Series/1500 Series/2500 Series & International AB140
- 1960-1967 Dodge D100 Series/D200 Series/D300 Series/W100 Series/W200 Series/W300 Series
- 1960-1973 Dodge Polara
- 1960-1961 Dodge Phoenix/Pioneer/Seneca & Plymouth Sport Wagon
- 1960-1962 Dodge Dart/Wm300 Power Wagon & GMC V3000 Forward Control
- 1960 Dodge Matador & GMC Truck
- 1960-1963 Dual-Ghia L6.4 & Plymouth Fleet Special
- 1960-1966 GMC 3000/3500/Suburban
- 1960-1964 International AM150
- 1960-1974 Toyota Land Cruiser
- 1961 DeSoto DeSoto & Dodge Lancer & Oldsmobile Classic 98/Cutlass/F85 & Pontiac Ventura
- 1961-1963 Bristol 407
- 1961-1966 Oldsmobile Starfire
- 1961-1971 Pontiac Catalina
- 1961-1964 International M Series Van
- 1961-1962 International C100/C102/C110/C112/C120/C122/C130/C132
- 1962-1966 Buick Wildcat & Jeep FC170
- 1962-1967 Buick Special
- 1962-1970 Chevy Corvette
- 1962-1965 International CM110/CM75/CM80
- 1963-1964 Dodge 330/440/880 & International C1000/C1100/C1200/C1300 & Jeep Utility Wagon & Studebaker Avanti/Hawk/Lark
- 1963-1966 Buick Riviera & Jeep Truck & Pontiac Star Chief & Studebaker Cruiser/Daytona
- 1963-1965 Bristol 408
- 1963-1971 Pontiac Bonneville/Grand Prix
- 1963-1970 Iso Rivolta
- 1964-1967 Buick Skylark/Sportwagon & Dodge A100 Truck & Fargo A100 Van & Gordon-Keeble GK1/IT
- 1964-1966 Dodge A100 & Jeep FC150 & Jensen C-V8 & Oldsmobile Jetstar 88 & Studebaker Commander
- 1964 International C900 & Plymouth Barracuda & Studebaker Challenger
- 1964-1965 GMC B3500 & Oldsmobile Jetstar I
- 1964-1970 Oldsmobile 442/Vista Cruiser
- 1964-1968 Oldsmobile Cutlass/F85
- 1965-1967 Bristol 409 & Buick Gran Sport & Cadillac Calais/Fleetwood & Checker Marathon & Chevy Chevelle & GMC L3500 & International M1400/M700 & Plymouth Belvedere II & Pontiac Beaumont
- 1965-1970 Avanti II & Excalibur Phaeton & Oldsmobile Delta 88 & Pontiac Strato-Chief
- 1965-1976 Dodge Coronet
- 1965-1978 Dodge Monaco
- 1965-1966 Plymouth Fury II & Pontiac Tempest
- 1965-1974 Iso Grifo & Plymouth Fury III/Satellite
- 1965-1969 Chevy Bel Air/Biscayne/Impala
- 1965-1968 Chevy Chevy II & Pontiac Acadian
- 1965 GMC PB1500 Series/PB2500 Series & International AB1200/AB1400/D1000/D1100/D1200/D1300/D300/D900
- 1965-1971 International M1100/M1200/M800 & Pontiac Laurentian/Parisienne
- 1966-1967 Checker Aerobus & Fargo D100 Panel Delivery/D200 Panel Delivery/W100 Panel Delivery & International 900A
- 1966-1972 Fargo D100 Pickup/D110 Pickup/D200 Pickup/D210 Pickup/W100 Pickup/W200 Pickup & Plymouth Barracuda
- 1966-1978 Dodge Charger
- 1966-1969 Chevy Caprice & Jeep Dispatcher/Universal Truck
- 1966 GMC 1000/K1000/K1000 Pickup & International 1000A/1100A/1200A/1300A/1500A & Jeep CJ3 & Pontiac LeMans & Studebaker Wagonaire
- 1966-1971 Jeep CJ5/CJ6/Commando/DJ5/Jeepster
- 1966-1968 Jeep CJ5A/CJ6A/DJ6
- 1966-1970 GMC K15/K1500 Pickup & Oldsmobile Toronado
- 1967 Fargo A108 Van & International 1000B/1100B/1200B/1300B/908B & Plymouth VIP
- 1967-1969 Bristol 410 & Chevy Camaro & Dodge Dart
- 1967-1971 International MA1200 & Plymouth GTX
- 1967-1970 GMC C15/C1500 Pickup/C25/C2500 Pickup/C35/C3500 Pickup/K15/K1500 Suburban/K25/K2500 Pickup & Pontiac Executive/Firebird/GTO
- 1967-1968 International 1500B & Oldsmobile Cutlass Supreme/Delmont 88
- 1967-1974 Iso S4 Fidia & Monteverdi 375
- 1967-1976 Jensen Interceptor
- 1968-1974 Dodge D100 Pickup/D200 Pickup/D300 Pickup/W100 Pickup/W200 Pickup/W300 Pickup & Plymouth Fury I/Fury II
- 1968-1975 Plymouth Road Runner
- 1968-1970 Chevy C10 Pickup/C10 Suburban/C20 Pickup/C20 Suburban/C30 Pickup/El Camino/G10 Van/G20 Van/K10 Pickup/K10 Suburban/K20 Pickup/K20 Suburban/K30 Pickup & GMC C15/C1500 Suburban/C25/C2500 Suburban/G15/G1500 Van/G25/G2500 Van/K25/K2500 Suburban/K35/K3500 Pickup/P25/P2500 Van/P35/P3500 Van & Pontiac LeMans/Tempest
- 1968-1969 Chevy P20 Van/P30 Van & International 908C
- 1968 International 1000C/1100C/1200C/1300C/1500C
- 1969-1972 Fargo W110 Pickup
- 1969 Chevy Brookwood/Estate/Kingswood/Townsman & International M1400/M800 Navy & Pontiac Beaumont
- 1969-1970 Chevy Blazer/Chevelle & International 1000D/1100D/1200D/1300D
- 1969-1974 Bristol 411 & Iso Lele
- 1969-1971 International M800 Post Office
- 1970-1974 Dodge Challenger
- 1970-1972 Plymouth Cuda
- 1970 GMC G35/G3500 Van/Jimmy/P15/P1500 Van & Oldsmobile Cutlass/Cutlass Supreme/F85 & Plymouth Superbird & Pontiac Acadian
- 1970-1971 Stutz Blackhawk
- 1971-1974 Dodge B200 Van/B300 Van & Monteverdi 450 SS
- 1971 International 1010/1110/1210/1310 & Pontiac Grandville
- 1971-1980 International Scout II
- 1972-1977 Plymouth Gran Fury
- 1974 Dodge B100 Van/M300/M350/MB300 & Plymouth PB200 Van/PB300 Van
- 1974-1978 Dodge Ramcharger & Plymouth Trailduster
- 1975-1978 Chrysler Cordoba & Dodge B200/B300/D100/D200/D300/W200/W300
- 1975-1977 Dodge Royal Monaco/W100
- 1976-1979 Dodge CB300
- 1976-1978 Plymouth PB200/PB300
- 1977-1978 Chrysler New Yorker/Newport & Dodge D150/W150
- 1977 Chrysler Town & Country
- 1978 Dodge D400/D450/Magnum
ACDelco R43S Notes:
- Verify vehicle application, position, and system configuration before installation.
Part TypeSpark Plug
BrandACDELCO
Package Height1.0
Package Width1.2
Package Length8.3
Weight0.15 PG
Hex TypeHex
Gap Size (Mm)0.89
Ground ConfigurationStandard
Center Electrode Core MaterialCopper
Reach (Mm)9.45
Good Maintenance Practices - Section 1 - Bullet 1Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. Pull the spark plug boot and cable away from the spark plug. If necessary, use a spark plug boot removing tool. DO NOT grab or violently pull spark plug cables.
Good Maintenance Practices - Section 1 - Bullet 4Remove each spark plug and place each one in a tray by cylinder number. This will help identify and relate any unusual condition to the cylinder involved.
Pack Of1
Good Maintenance Practices - Section 1 - Bullet 5Apply dielectric grease into the boot area to reduce the chance of exterior tracking on the buttress tower of the spark plug. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal.
Good Maintenance Practices - Section 1 - Bullet 2Brush or air blast dirt away from the well areas before removing spark plugs. CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells.
Approximate Resistor Value2-20k ohms
Good Maintenance Practices - Section 1 - Bullet 3Use the correct deep socket size to loosen each spark plug one or two turns. NOTE: To remove spark plugs from aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal.
Product DescriptionACDelco Gold (Professional) Conventional Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional. ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Center Electrode DesignStandard
Thread Size14mm
Width (In)3.5
Gap Size0.033 in (0.838 mm)
Thread Diameter (Mm)14
Resistor PlugYes
Thread Diameter (In)0.55
Length (In)4.1
Insulator MaterialES703
Part CategoryReplacement Parts
Pre-Gap Size0.04
Ground Electrode Quantity1
Washer TypeCrush
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 1Your engine having trouble starting, hesitating, or cutting out
Faq - Answer 8Yes, ACDelco has marine spark plugs for many applications.
Signs Of Wear &#38; Troubleshooting - Section 1 - HeaderSigns of wear for spark plugs include but are not limited to:
Faq - Answer 7No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires. These conditions severely affect spark plug performance. Replace your dirty, fouled spark plugs with new ACDelco spark plugs.
Faq - Answer 6Yes, pre-ignition can cause serious damage to your engine. Pre-ignition is the ignition of fuel before the actual spark occurs, which causes a rapid temperature rise in the combustion chamber that can damage engine components and melt spark plug electrodes. Causes of pre-ignition include but are not limited to a buildup of deposits that can become incandescent in the combustion chamber, improper installation torque being applied to spark plugs, and having spark plugs with a heat range that is too hot for the engine's operating condition.
Faq - Answer 5Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. Refer to your vehicle owner's manual or contact the manufacturer for more information.
Faq - Answer 4Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.
Faq - Answer 3Yes. Diesel engines require glow plugs because diesel engines operate differently than gas engines. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for their cold starts. Refer to your owner's manual or contact your vehicle's manufacturer for more information.
Faq - Answer 2Yes, if it is the scheduled time for spark plug replacement. It is okay to replace one spark plug if it is fouled or damaged prior to scheduled maintenance, provided the source of the damage is found and corrected.
Hex Size (In)13/16
Faq - Answer 1Yes, this interval depends on what type of spark plug your vehicle requires. Refer to your owner's manual or contact your vehicle's manufacturer for more information.
Features &#38; Benefits - Bullet 6Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Washer(S) IncludedYes
Seat TypeFlat
Features &#38; Benefits - Bullet 7Premium aftermarket replacement part
Features &#38; Benefits - Bullet 8Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
Insulator Height62.97
Center Electrode Tip MaterialNickel Alloy
Ground Electrode Core MaterialNickel
Features &#38; Benefits - Bullet 2Copper core provides great heat transfer and helps maximize plug durability
Features &#38; Benefits - Bullet 3Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires
Resistor TypeYes
Features &#38; Benefits - Bullet 4Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
Features &#38; Benefits - Bullet 5Available for use in Marine applications
Manufacturer Heat Range3
Features &#38; Benefits - Bullet 1Black Onyx coating helps reduce corrosion
Reach0.37
Ground Electrode Tip DesignStandard
Electrical Terminal TypeNon-Removable Nut
Good Maintenance Practices - Section 1 - HeaderVisually inspect spark plugs for signs of wear. Follow these steps for removing spark plugs for inspection, servicing or replacement:
Good Maintenance Practices - Section 1 - Bullet 6Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap. NOTE: ACDelco Professional Iridium Spark Plugs are pre-gapped during manufacturing. Never attempt to gap an ACDelco Professional Iridium Spark Plug. You could damage the spark plug. Replace any incorrectly gapped ACDelco Professional Iridium Spark Plugs with plugs that are correctly gapped.
Good Maintenance Practices - Section 1 - Bullet 7Install spark plugs or glow plugs to the proper torque per the manufacturers' specification.
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 6Damaged spark plug boots
Faq - Question 8Does ACDelco have marine spark plugs?
Faq - Question 7Can I just clean my spark plugs instead of replacing them?
Height (In)1.1
Faq - Question 6What is pre-ignition and can it damage my engine?
Faq - Question 5When I replace my spark plugs, should I also replace my spark plug wires?
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 2Sluggish engine performance, loss of engine power, or decreased fuel economy
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 3Lack of acceleration or loss of speed when driving uphill under load
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 4Cracks in the upper or lower portion of the spark plug insulator
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 5Chipped or broken insulator tips
Part FitmentDirect Fit
Faq - Question 4Are ACDelco spark plugs pre-gapped?
Faq - Question 3Does a diesel engine require a different type of plug than a gas engine?
Weight (Lb)0.4
Faq - Question 2Should I change all of my vehicle's spark plugs at the same time?
Hex Size20.62 MM
Faq - Question 1Is there a recommended interval for changing my vehicle's spark plugs?
Vendor Part NumberR43S
Package Qty1
Package TypeEA
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