NGK PFR6B 3500 Iridium Spark Plug High Performance OEM Replacement

NGK PFR6B 3500 iridium spark plugs are high-performance OEM replacements, compatible with many post-2000 models; OEM number PFR6B 3500. Iridium electrodes ignite the air-fuel mixture inside the cylinder head. Installation difficulty is moderate; labor about 30–60 minutes depending on model. If you experience rough idle, sluggish acceleration, or increased fuel consumption, electrode wear or carbon buildup indicates replacement is needed to restore power.