The Platinum Spark Plug (AP5503) is a high-performance solution designed to enhance engine efficiency and longevity. Featuring a platinum center electrode firing tip, it ensures quicker firing, smoother starts, and improved fuel efficiency while preventing gap erosion for extended service life. Its high alumina ceramic insulator provides superior thermal conductivity and insulation, boosting strength and reliability under demanding conditions. The multi-rib insulator design effectively prevents flash-over, ensuring consistent performance. With a nickel-plated shell, this spark plug resists corrosion, adding durability for prolonged use. Engineered with a mid-projection standard center electrode and a flat seat type, it is tailored for older engine applications and designs. The combination of platinum and nickel materials in the electrode tips further enhances its performance grade, making it a dependable choice for drivers seeking improved acceleration and long-lasting reliability.

Product Features:

• Engineered with a platinum firing tip that prevents gap erosion for longer service life.
• Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
• The multi-rib insulator prevents flash-over.
• Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
• Incorporates a mid-projection standard center electrode and flat seat type, making it ideal for older engine designs and applications.