NGK C5HSA 4429 Spark Plug Iridium Platinum Multi-Metal Durable Type

NGK C5HSA 4429 spark plug with iridium electrode; standard-type replacement; electrode material is ordinary nickel alloy; less durable than iridium or platinum but low cost and mature process; suitable for economical repairs. OEM number 6899; fits 2000s Buick, Chevrolet models. Check thread size M14x1.25 and reach 26.5 mm. Fires the mixture to ensure stable operation; resistance 6k ohm to suppress EMI. Installation difficulty: medium; remove ignition coil and old plug; tighten to standard torque with torque wrench.