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autolite 258-4pk copper non-resistor spark plug: 4-pack for optimal performance logo

Autolite 258-4PK Copper Non-Resistor Spark Plug: 4-Pack for Optimal Performance Review

3

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Average

Revainrating 4 out of 5  
Rating 
3.8
🧯 Ignition Parts, 🛠️ Replacement Parts

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Details

BrandAutolite
Core MaterialCopper
Top Material TypeAlloy Steel

Description of Autolite 258-4PK Copper Non-Resistor Spark Plug: 4-Pack for Optimal Performance

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof. Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength. Multi-rib insulator reduces danger of "flash-over". Resistor reduces radio frequency interference (RFI) and electrode erosion. Full copper core electrode provides better performance in all conditions.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    0
  • 2
    0
  • 1
    1

Type of review

Revainrating 5 out of 5

"High-Quality Spark Plugs for Automotive Use!

The Autolite 258 4PK Copper Non Resistor Spark plugs are perfect for automotive use. My analysis of this product showed that it is very reliable and efficient. The installation process was quick and easy, and the copper core technology ensures a strong and long-lasting spark. These plugs perform excellently in all weather conditions and at high speeds. The only downside is that they might not be suitable for racing cars that require higher performance spark plugs. Overall, I highly recommend…

Pros
  • Good value for a pack of four spark plugs.
Cons
  • Not recommended for modern engines that require resistor spark plugs.

Revainrating 1 out of 5

Not identical to Champion CJ14

Not identical to Champion CJ14 lawnmower spark plugs. The metal tip over the porcelain is shorter so the spark plug cap keeps popping out. This is on a Wisconsin Robin lawn mower engine. I recommend the Champion 846 CJ14.

Pros
  • Multi-ribbed insulator reduces risk of burnout
Cons
  • Annoys me

Revainrating 5 out of 5

Autolite 258 for spark plugs

Ordered and arrived 3 days late USPS. I installed 2 of these on my 20hp Agco Allis Simples liquid cooled engine. Kawasaki and it runs very smooth. I am very happy with these spark plugs, this tractor has never worked so well, even with ngk spark plugs. I saved this page so I can order more in the future.

Pros
  • Cold formed steel body and precision rolled threads with solid end stud for strength
Cons
  • Some imperfections