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Finland, Helsinki
1 Level
776 Review
70 Karma

Review on Optimized Motorcraft SP-412 Spark Plug by Mdl Thurston

Revainrating 5 out of 5

You are really real. ?

Very poor quality product. After installation, after 2 days of driving, two candles cracked. Went to the dealer and bought all six again. The dealer hasn't had any problems with them so far.

Pros
  • Reduces misfires
Cons
  • Something else