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Autolite AR51

AR-51 Race Plug

Autolite AR51

417-AR51

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Autolite AR51 AR-51 Race Plug $3.99
AR-51 Race Plug

Specifications:

Center Electrode Core Material
Copper
Center Electrode Tip Material
Copper
Insulator Material
Ceramic
Center Electrode Design
Standard / Regular
Thread Size
14mm X 1.25
Seat Style
Gasket
Ground Electrode Tip Material
Copper
Insulator Type
Mid Projection
Reach (in)
3/4"
Drive Size
13/16" (21mm)
Resistor
Non Resistor
Gap- Factory Preset
.025"/0.6mm
Manufacturer's Part Number:
AR51

Autolite Race Plugs feature the latest plug design technology. Their multi-rib insulator, copper center electrode, large cut back ground electrode (covered in nickel plating and sealed inside a longer insulator to resist carbon fouling), and double terminated suppressor provide the best EMI suppression.

NOTE: Plugs are priced individually but may only be ordered in sets of 4.
Spark Plug Heat Ranges & Applications

Does Autolite AR51 fit your vehicle?

Narrow Results

1984-1985 PORSCHE 911

  • CC: 3294
  • Liter: 3.3
  • SubModel: BASE
  • EngineType: H6 ( 3.3 L / 3294 CC )

1966 FERRARI 275 GTS

  • EngineType: ALL
  • SubModel: ALL

1967-1968 FERRARI 275 GTS

  • CC: 3286
  • Liter: 3.3
  • SubModel: BASE
  • CUI: 201
  • EngineType: V12 ( 3.3 L / 201 )

1971-1972 FERRARI 365 GTC/4

  • EngineType: ALL
  • SubModel: ALL

1964-1965 FERRARI 275 LM

  • EngineType: ALL
  • SubModel: ALL

1964-1968 FERRARI 330 GT

  • EngineType: ALL
  • SubModel: ALL

1968 FERRARI 275 GT

  • EngineType: ALL
  • SubModel: ALL

1966-1968 FERRARI 330 GTS

  • EngineType: ALL
  • SubModel: ALL

1965-1967 FIAT 1500

  • EngineType: ALL
  • SubModel: ALL

1968-1974 FERRARI 365 GTB/4

  • EngineType: ALL
  • SubModel: ALL

1968-1970 FERRARI 365 GTC

  • EngineType: ALL
  • SubModel: ALL

1972-1973 FIAT 124

  • CC: 1592
  • Liter: 1.6
  • SubModel: BASE
  • CUI: 97
  • EngineType: L4 ( 1.6 L / 97 )

1963-1964 ALFA ROMEO GIULIA SPRINT

  • EngineType: ALL
  • SubModel: ALL

1964-1965 FERRARI 250 LM

  • EngineType: ALL
  • SubModel: ALL

1970-1973 FIAT 124

  • CC: 1438
  • Liter: 1.4
  • SubModel: BASE
  • EngineType: L4 ( 1.4 L / 1438 CC )

1971-1973 FIAT 124

  • CC: 1608
  • Liter: 1.6
  • SubModel: SPIDER
  • CUI: 98
  • EngineType: L4 ( 1.6 L / 98 )

1968-1970 FERRARI 365 GTS

  • EngineType: ALL
  • SubModel: ALL

1959-1961 ALFA ROMEO GIULIETTA

  • EngineType: ALL
  • SubModel: ALL

1964-1968 FERRARI 275 GTB

  • EngineType: ALL
  • SubModel: ALL

1971-1973 FIAT 124

  • CC: 1608
  • Liter: 1.6
  • SubModel: SPIDER
  • EngineType: L4 ( 1.6 L / 1608 CC )

1967-1971 FERRARI 365 GT

  • EngineType: ALL
  • SubModel: ALL

1970-1971 FIAT 124

  • CC: 1438
  • Liter: 1.4
  • SubModel: SPIDER
  • EngineType: L4 ( 1.4 L / 1438 CC )

1967-1968 FERRARI 275 GTS

  • CC: 3286
  • Liter: 3.3
  • SubModel: BASE
  • CUI: 201
  • EngineType: V12 ( 3.3 L / 201 )

1967-1968 ALFA ROMEO GIULIA SPRINT

  • EngineType: ALL
  • SubModel: ALL

1960-1966 FERRARI 400 SUPERAMERICA

  • EngineType: ALL
  • SubModel: ALL

1964-1965 FERRARI 275 GTS

  • CC: 3286
  • Liter: 3.3
  • SubModel: BASE
  • CUI: 201
  • EngineType: V12 ( 3.3 L / 201 )

1972 FERRARI 365 GT4

  • CC: 4390
  • Liter: 4.4
  • SubModel: BASE
  • CUI: 268
  • EngineType: V12 ( 4.4 L / 268 )

1970-1974 FERRARI 365 GTS/4

  • EngineType: ALL
  • SubModel: ALL

1971-1973 FIAT 124

  • CC: 1608
  • Liter: 1.6
  • SubModel: BASE
  • CUI: 98
  • EngineType: L4 ( 1.6 L / 98 )

1966-1968 FERRARI 330 GTC

  • EngineType: ALL
  • SubModel: ALL

1987 PORSCHE 911

  • EngineType: ALL
  • SubModel: BASE

1965 PORSCHE 911

  • EngineType: ALL
  • SubModel: ALL

1964-1965 FERRARI 275 GTS

  • CC: 3286
  • Liter: 3.3
  • SubModel: BASE
  • CUI: 201
  • EngineType: V12 ( 3.3 L / 201 )

1973-1976 FERRARI 365 GT4

  • EngineType: ALL
  • SubModel: ALL

1974 FERRARI 365 GT4 BB

  • EngineType: ALL
  • SubModel: ALL

1972-1973 FIAT 124

  • CC: 1592
  • Liter: 1.6
  • SubModel: SPIDER
  • CUI: 97
  • EngineType: L4 ( 1.6 L / 97 )

1970-1973 FIAT 124

  • CC: 1438
  • Liter: 1.4
  • SubModel: BASE
  • CUI: 88
  • EngineType: L4 ( 1.4 L / 88 )

1961-1967 FIAT 125

  • CC: 1295
  • Liter: 1.3
  • SubModel: BASE
  • CUI: 79
  • EngineType: L4 ( 1.3 L / 79 )

1986-1989 PORSCHE 911

  • EngineType: ALL
  • SubModel: TURBO CARRERA

1971-1973 FIAT 124

  • CC: 1608
  • Liter: 1.6
  • SubModel: BASE
  • EngineType: L4 ( 1.6 L / 1608 CC )

1991-1992 PORSCHE 911

  • EngineType: ALL
  • SubModel: TURBO

1960-1964 PORSCHE CARRERA

  • EngineType: ALL
  • SubModel: ALL

1982-1983 PORSCHE 911

  • EngineType: ALL
  • SubModel: BASE

1970-1971 FIAT 124

  • CC: 1438
  • Liter: 1.4
  • SubModel: SPIDER
  • CUI: 88
  • EngineType: L4 ( 1.4 L / 88 )

1967 ALFA ROMEO DUETTO 1600

  • EngineType: ALL
  • SubModel: ALL