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Proform GM HEI Ignition Coils

2.33 out of 5 stars 3 Customer Reviews

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.

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Proform GM HEI Ignition Coils 66943C

Proform GM HEI Ignition Coils 66943C

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

Part Number: PRO-66943C

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

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