United States of America, Albuquerque

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Review on 🔥 Bosch Automotive (9621) OE Fine Wire Double Iridium Spark Plug - Single: Ignite Optimal Performance and Efficiency! by Alexander Chavis

Name: 🔥 Bosch Automotive (9621) OE Fine Wire Double Iridium Spark Plug - Single: Ignite Optimal Performance and Efficiency!
Item: 🔥 Bosch Automotive (9621) OE Fine Wire Double Iridium Spark Plug - Single: Ignite Optimal Performance and Efficiency!
Rating: 5

February 20, 2023

Less idle vibration and better acceleration. Old original spark plugs look very unusual.

Replaced DENSO SC20HR11 OEM SPARK PLUGS at 100,000 miles on my 2011 Toyota Corolla (2ZRFE engine). Engine performance is greatly improved. Less idle vibration and better acceleration. Old original spark plugs look badly burned. I'm glad I replaced them before they wore out, even though Toyota's service manual says it should cost $120,000 to service.

Pros

Permanent Test Results

Cons

Vulgarity

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