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Autolite Racing Spark Plugs R51 Plug, Racing, Copper Core, Gasket Seat, 14mm Thread, 0.750 in. Reach, Each

SKU: ATLR51

Spark Plugs

Autolite Racing Spark Plugs R51 Plug, Racing, Copper Core, Gasket Seat, 14mm Thread, 0.750 in. Reach, Each

SKU: ATLR51

Spark Plugs
A$17.53
IN STOCK! Est Ship 3-7 Days days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

Autolite racing spark plugs are the preferred choice for many professionals. They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less pre-ignition. These replacement spark plugs are available in colder heat ranges than most plug manufacturers to support modified engines. They feature a cut background electrode, which improves ignitibility and faster flame kernel growth. Autolite racing spark plugs have a nickel plated finish for long life and corrosion resistance. They're available in a variety of styles, sizes, and other options--in universal or vehicle-specific applications.

Part Type

Spark Plugs

Data: v4.2 - Upd: 2026-10-08 16:48:49

Specifications

Product Attributes - Brand
Autolite
Product Attributes - Manufacturer's Part Number
R51
Product Attributes - Part Type
Spark Plugs
Product Attributes - Product Line
Autolite Racing Spark Plugs
Product Attributes - UPC
00009100017727
Product Attributes - Spark Plug Thread Size
14mm
Product Attributes - Spark Plug Reach (in.)
0.750 in.
Product Attributes - Spark Plug Reach (mm)
19.05mm
Product Attributes - Shorty Spark Plug
No
Product Attributes - Resistor
No
Product Attributes - Electrode Tip Material
Chromium nickel alloy
Product Attributes - Electrode Core Material
Copper
Product Attributes - Center Electrode Type
Projected
Product Attributes - Spark Plug Seat Style
Gasket
Product Attributes - Wrench Diameter
13/16 in.
Product Attributes - Ground Strap Quantity
One
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Autolite
StreetFX SKU atlR51
SFX Item ID 5177404
Supplier Item Code 5177404
Manufacturer SKU R51
Manufacturer UPC 9100017727
Alternative References ATL-AR51, 14mm

Compatibility

Application Data
  • UniversalNo
    MakeALFA ROMEO
    ModelDUETTO 1600
    SubmodelSPIDER
    Beginning Year1967
    Ending Year1967
    Engine TypeL4
    Engine FamilyALFA ROMEO L4 GAS
    Engine Size1.6L/1570cc
  • UniversalNo
    MakeALFA ROMEO
    ModelGIULIA SPRINT
    SubmodelBASE
    Beginning Year1967
    Ending Year1968
    Engine TypeL4
    Engine FamilyALFA ROMEO L4 GAS
    Engine Size1.6L/1570cc
  • UniversalNo
    MakeFERRARI
    Model275 GT
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size3.3L/3286cc
  • UniversalNo
    MakeFERRARI
    Model275 GTB
    SubmodelBASE
    Beginning Year1964
    Ending Year1968
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size3.3L/3286cc
  • UniversalNo
    MakeFERRARI
    Model330 GT
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.0L/3967cc
  • UniversalNo
    MakeFERRARI
    Model330 GTC
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.0L/3967cc
  • UniversalNo
    MakeFERRARI
    Model330 GTS
    SubmodelBASE
    Beginning Year1968
    Ending Year1968
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.0L/3967cc
  • UniversalNo
    MakeFERRARI
    Model365 GT4
    SubmodelBASE
    Beginning Year1973
    Ending Year1974
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GT4 BB
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeH12
    Engine FamilyFerrari H12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GTB/4
    SubmodelDAYTONA
    Beginning Year1968
    Ending Year1974
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GT
    SubmodelBASE
    Beginning Year1968
    Ending Year1970
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GTC/4
    SubmodelBASE
    Beginning Year1971
    Ending Year1972
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GTC
    SubmodelBASE
    Beginning Year1968
    Ending Year1970
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GTS/4
    SubmodelDAYTONA
    Beginning Year1970
    Ending Year1974
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFERRARI
    Model365 GTS
    SubmodelBASE
    Beginning Year1968
    Ending Year1970
    Engine TypeV12
    Engine FamilyFerrari V12
    Engine Size4.4L/4390cc
  • UniversalNo
    MakeFIAT
    Model124
    SubmodelBASE
    Beginning Year1970
    Ending Year1973
    Engine TypeL4
    Engine FamilyFiat 4-cylinder
    Engine Size1.4L/1438cc
  • UniversalNo
    MakeFIAT
    Model124
    SubmodelBASE
    Beginning Year1971
    Ending Year1973
    Engine TypeL4
    Engine FamilyFiat 4-cylinder
    Engine Size1.6L/1608cc
  • UniversalNo
    MakeFIAT
    Model124
    SubmodelSPIDER
    Beginning Year1970
    Ending Year1971
    Engine TypeL4
    Engine FamilyFiat 4-cylinder
    Engine Size1.4L/1438cc
  • UniversalNo
    MakeFIAT
    Model124
    SubmodelSPIDER
    Beginning Year1971
    Ending Year1973
    Engine TypeL4
    Engine FamilyFiat 4-cylinder
    Engine Size1.6L/1608cc
  • UniversalNo
    MakeFIAT
    Model1500
    SubmodelBASE
    Beginning Year1965
    Ending Year1967
    Engine TypeL4
    Engine FamilyFiat 4-cylinder
    Engine Size1.5L/1481cc
  • UniversalNo
    MakeMASERATI
    Model228I
    SubmodelBASE
    Beginning Year1990
    Ending Year1990
    Engine TypeV6
    Engine FamilyMaserati V6
    Engine Size2.8L/2791cc
  • UniversalNo
    MakeMASERATI
    ModelSPYDER
    SubmodelBASE
    Beginning Year1989
    Ending Year1991
    Engine TypeV6
    Engine FamilyMaserati V6
    Engine Size2.8L/2791cc
  • UniversalNo
    MakePORSCHE
    Model911
    SubmodelTURBO
    Beginning Year1992
    Ending Year1992
    Engine TypeH6
    Engine FamilyPorsche 6-cylinder
    Engine Size3.3L/3294cc
  • UniversalNo
    MakePORSCHE
    Model911
    SubmodelTURBO CARRERA
    Beginning Year1986
    Ending Year1989
    Engine TypeH6
    Engine FamilyPorsche 6-cylinder
    Engine Size3.3L/3294cc
  • UniversalNo
    MakePORSCHE
    ModelCARRERA
    SubmodelBASE
    Beginning Year1960
    Ending Year1964
    Engine TypeH4
    Engine FamilyPorsche 4-cylinder
    Engine Size2.0L/1966cc

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