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Autolite Racing Spark Plugs R25 Plug, Racing, Copper Core, Tapered Seat, 14mm Thread, 0.431 in. Reach, Each

SKU: ATLR25

Spark Plugs

Autolite Racing Spark Plugs R25 Plug, Racing, Copper Core, Tapered Seat, 14mm Thread, 0.431 in. Reach, Each

SKU: ATLR25

Spark Plugs
A$17.85
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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: 2026-09-27 13:16:53

Specifications

Product Attributes - Brand
Autolite
Product Attributes - Manufacturer's Part Number
R25
Product Attributes - Part Type
Spark Plugs
Product Attributes - Product Line
Autolite Racing Spark Plugs
Product Attributes - UPC
00009100026569
Product Attributes - Spark Plug Thread Size
14mm
Product Attributes - Spark Plug Reach (in.)
0.460 in.
Product Attributes - Spark Plug Reach (mm)
11.68mm
Product Attributes - Manufacturer Heat Range
5
Product Attributes - Shorty Spark Plug
No
Product Attributes - Resistor
Yes
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
Tapered
Product Attributes - Wrench Diameter
5/8 in.
Product Attributes - Ground Strap Quantity
One
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Autolite
StreetFX SKU atlR25
SFX Item ID 5177513
Supplier Item Code 5177513
Manufacturer SKU R25
Manufacturer UPC 9100026552
Alternative References ATL-AR25, 14mm

Compatibility

Application Data
  • UniversalNo
    MakeAM GENERAL
    ModelHUMMER
    SubmodelBASE
    Beginning Year1995
    Ending Year1996
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1971
    Ending Year1972
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1973
    Ending Year1976
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
  • UniversalNo
    MakeAVANTI
    ModelII
    SubmodelBASE
    Beginning Year1977
    Ending Year1980
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeBRICKLIN
    ModelSV-1
    SubmodelBASE
    Beginning Year1975
    Ending Year1976
    Engine TypeV8
    Engine FamilyFord small block Windsor
    Engine Size5.8L/351
  • UniversalNo
    MakeBUICK
    ModelELECTRA
    Submodel225
    Beginning Year1969
    Ending Year1969
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelELECTRA
    Submodel225 CUSTOM
    Beginning Year1969
    Ending Year1969
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelELECTRA
    SubmodelBASE
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelELECTRA
    SubmodelCUSTOM
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelREGAL
    SubmodelGRAND NATIONAL
    Beginning Year1984
    Ending Year1987
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelREGAL
    SubmodelLIMITED
    Beginning Year1987
    Ending Year1987
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelREGAL
    SubmodelT-TYPE
    Beginning Year1984
    Ending Year1986
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelRIVIERA
    SubmodelBASE
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelRIVIERA
    SubmodelBASE
    Beginning Year1984
    Ending Year1985
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelRIVIERA
    SubmodelLUXURY
    Beginning Year1984
    Ending Year1985
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelRIVIERA
    SubmodelT-TYPE
    Beginning Year1984
    Ending Year1985
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelROADMASTER
    SubmodelBASE
    Beginning Year1993
    Ending Year1993
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelROADMASTER
    SubmodelESTATE WAGON
    Beginning Year1993
    Ending Year1993
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelROADMASTER
    SubmodelLIMITED
    Beginning Year1993
    Ending Year1993
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelSKYLARK
    SubmodelBASE
    Beginning Year1980
    Ending Year1980
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size2.8L/173
  • UniversalNo
    MakeBUICK
    ModelSKYLARK
    SubmodelLIMITED
    Beginning Year1980
    Ending Year1980
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size2.8L/173
  • UniversalNo
    MakeBUICK
    ModelSKYLARK
    SubmodelSPORT
    Beginning Year1980
    Ending Year1980
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size2.8L/173
  • UniversalNo
    MakeBUICK
    ModelWILDCAT
    SubmodelBASE
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeBUICK
    ModelWILDCAT
    SubmodelCUSTOM
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.0L/430
  • UniversalNo
    MakeCHEVROLET
    ModelASTRO
    SubmodelBASE
    Beginning Year1989
    Ending Year1995
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size4.3L/262

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