Bosch Platinum Spark Plugs are engineered for up to 2X longer service life. GENUINE BOSCH SPARK PLUGS . Platinum Spark Plugs. Fine wire Platinum firing pin for better ignitability. Unique 360 continuous laser weld fuses corrosion resistant Platinum firing pin to base.
These plugs were used to replace AC Delco units in an '01 Cavalier. After about 5,000mi, have no issues. Engine starts instantly, hot or cold and runs SMOOTH. I would DEFINITELY buy again.