别克/凯迪拉克/雪佛兰铱金火花塞ITV20 5339，点火效率提升之选

For Buick Regal, Excelle, Cruze and Cadillac CTS-V, Chevrolet Cruze and other GM models after 2000, we recommend KLP Iridium Spark Plug ITV20 5339. Although not directly corresponding to the original factory numbers, the iridium electrode material is more durable than ordinary plugs and can effectively improve combustion efficiency. After installation, acceleration is smoother, and idling vibration and high fuel consumption problems are significantly improved. If cold-start difficulty, acceleration hesitation, or sudden fuel consumption rise occur, most likely the old spark plugs are worn; replace promptly to restore performance.