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ACDelco 9628M Professional Spark Plug Review

3

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Average

Revainrating 3.5 out of 5  
Rating 
3.6
🧯 Ignition Parts, 🛠️ Replacement Parts

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Description of ACDelco 9628M 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.

Reviews

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

Revainrating 5 out of 5

Impressive Spark Plug

Through trial and error, I found that this spark plug is the real deal. It works amazingly well and has improved my car`s performance significantly. The installation process was seamless and it fits perfectly.The build quality is excellent and it provides a longer lifespan. However the price could be a bit on the higher side for some customers..

Pros
  • Improved performance, seamless installation, excellent build quality, long lifespan.
Cons
  • Higher price.

Revainrating 2 out of 5

Horrible Spark Plug Performance

As a professional in the automotive industry I have tested several spark plugs and was truly disappointed with this one. As a result of my tests, I determined that the performance was subpar in comparison to other options on the market... The only pro is that it was easy to install. However, the cons outweigh this as it misfired often and caused poor engine performance. Stay away from this spark plug..

Pros
  • Long lasting and durable design.
Cons
  • May experience difficulty with installation if not familiar with spark plug replacements.

Revainrating 4 out of 5

Good quality - here is the length

I have the model 350 with HEI and ram horns. I wanted to route the new cables under the exhaust just like the current ones. This kit wasn't enough for that so I had to send them back. If this information had been available beforehand, I could have avoided it. Therefore I give the lengths below. I ended up using AC Delco 9088 wires designed for a mid seventies Vette with HEI. They worked great, a few wires were a bit long but still manageable. I will include the length of these wires in my…

Pros
  • Conductor, wire length and gauge help maximize spark output and protection
Cons
  • Available in black only