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ACDelco 946M Professional Spark Plug Review

3

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Very good

Revainrating 4.5 out of 5  
Rating 
4.3
🧯 Ignition Parts, 🛠️ Replacement Parts

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Description of ACDelco 946M Professional Spark Plug

Wire conductor, wire length, and diameter help provide maximum spark delivery and protection. Spark plug distributor boot shape and materials provide proper fit, installation, and water-tight seal. Terminal design improves spark plug retention and assists installation with excellent corrosion resistance. Insulator employs high dielectric materials. Coil retainer prevents fretting and micro-arcing. Fit type: Vehicle Specific.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    0
  • 2
    1
  • 1
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Type of review

Revainrating 5 out of 5

Impressive Performance Spark Plug

The ACDelco spark plug is a great choice for any automotive needs. Based on our own experience, we found that it enhances our car's ignition system and gives a smooth start. The quality of the spark plug is top-notch and delivers excellent performance. The only downside we found was its higher price compared to other brands.

Pros
  • Improves ignition system performance
Cons
  • Higher price point

Revainrating 2 out of 5

easy to distribute.

I should have gotten a replacement set for these BCSs, they popped heads so easily. I ran a 1965 f100 and used them, had to cycle them on and off multiple times when changing distributors, checking spark, etc./; Out of 6 wires 3 removed the heads so I sent them back and got a replacement set, I will attach them very very carefully. but they work and I don't touch them.

Pros
  • Spark Plugs and Wires
Cons
  • Safety

Revainrating 5 out of 5

The wires are longer than the standard wires, which is nice, and it feels like the silicone material is meant to stay.

I am very impressed. I use this on a 1962 Chevy II Nova with an I6 engine. The wires are longer than standard wires which is nice and it seems like the silicone material should stay flexible longer, it also creates a good seal around the connectors. The clamps are well made and hold securely. high quality product

Pros
  • Replacement Parts
Cons
  • Upgrades