Buick Regal Verano Chevrolet Iridium Spark Plug 12637199 41-123 Original OEM Quality

When your Buick Verano, Buick Excelle, or Chevrolet model experiences idle instability, hesitation on acceleration, cold-start difficulty, or noticeably higher fuel consumption, usually due to aged or carbon-fouled spark plug electrodes and insufficient ignition energy. This iridium spark plug precisely ignites the air-fuel mixture for smooth power output, improved fuel economy, and reduced emissions. OEM 12637199 (41-123); fits Buick LaCrosse, Verano and Chevrolet models after 2000. Use a torque wrench to tighten to factory torque; ensure spark plug gap matches engine; avoid over-tightening or under-tightening to prevent thread damage or leakage.