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Review on πŸ”₯ ACDelco GM Original Equipment 41-121 Iridium Spark Plug: Optimize Your Engine Performance by Francisco Russell

Revainrating 5 out of 5

good spark plugs are suitable for spare parts

Very good spark plugs, I changed them at 60,000 km on my turbocharged engine. They looked so good they would probably last up to 100,000 miles.

Pros
  • Robust construction
Cons
  • There are some nuances