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Proform GM HEI Ignition Coils 66943C Coil, HEI, In-Cap, E-Core, Square, Epoxy, Black, 50,000 V, GM, Each

SKU: PRO66943C

Ignition Coils

Proform GM HEI Ignition Coils 66943C Coil, HEI, In-Cap, E-Core, Square, Epoxy, Black, 50,000 V, GM, Each

SKU: PRO66943C

Ignition Coils
A$117.45
IN STOCK! Est Ship 4-7 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

Got a GM HEI ignition that's feeling kind of weak-kneed lately? Proform's epoxy-filled GM HEI ignition coils could be the answer to your problem. They replace the stock distributor-mounted HEI coil and crank out a hefty 50,000 V of plug-firing power. That's 15,000 V higher than the OE coil, which results in more completely burned fuel and better all-around performance.

Part Type

GM HP 50 000 Volt HEI Coil

Data: v4.2 - Upd: 2026-10-20 22:06:37

Specifications

Product Attributes - Brand
Proform Parts
Product Attributes - Manufacturer's Part Number
66943C
Product Attributes - Part Type
Ignition Coils
Product Attributes - Product Line
Proform GM HEI Ignition Coils
Product Attributes - UPC
037995319435
Product Attributes - Coil Style
In-cap
Product Attributes - Coil Internal Construction
Epoxy
Product Attributes - Coil Wire Attachment
HEI in-cap
Product Attributes - Coil Color
Black
Product Attributes - Maximum Voltage
50,000 V
Product Attributes - Mounting Bracket Included
No
Product Attributes - Coil Wire Included
No
Product Attributes - Ballast Resistor Included
No
Product Attributes - Coil Shape
Square
Product Attributes - Height (in.)
3.000 in.
Product Attributes - Length (in.)
3.000 in.
Product Attributes - Width (in.)
2.500 in.
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Proform Parts
StreetFX SKU pro66943C
SFX Item ID 5007040
Supplier Item Code 5007040
Manufacturer SKU 66943C
Manufacturer UPC 37995319435
Alternative References PFM66943C

Compatibility

Application Data
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeL6
    Engine FamilyGM inline 6-cylinder
    Engine Size4.1L/250
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeL6
    Engine FamilyGM inline 6-cylinder
    Engine Size4.1L/250
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeL6
    Engine FamilyGM inline 6-cylinder
    Engine Size4.1L/250
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelBASE
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size4.3L/260
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeL6
    Engine FamilyGM inline 6-cylinder
    Engine Size4.1L/250
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelAPOLLO
    SubmodelSR
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size4.3L/260
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size7.5L/455
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1975
    Ending Year1977
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1975
    Ending Year1977
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1980
    Ending Year1980
    Engine TypeV8
    Engine FamilyPontiac V8
    Engine Size4.9L/301
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1980
    Ending Year1981
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelBASE
    Beginning Year1980
    Ending Year1981
    Engine TypeV8
    Engine FamilyPontiac V8
    Engine Size4.3L/265
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1977
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.8L/231
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1975
    Ending Year1979
    Engine TypeV8
    Engine FamilyBuick V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    SubmodelCUSTOM
    Beginning Year1978
    Ending Year1979
    Engine TypeV6
    Engine FamilyGM V6
    Engine Size3.2L/196

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