Autolite APP105 Spark Plug

Reliable Ignition Performance for Chevrolet, Ford, Mazda, and Mercury Vehicles

The Autolite Double Platinum Spark Plug APP105 is engineered to deliver consistent ignition performance for a range of vehicles including Chevrolet Silverado 1500, Ford Mustang, and Mazda B4000. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Double platinum center and ground electrode tips for extended wear
• Tapered ground electrode design with nickel core for durability
• Standard center electrode design with platinum core and tip
• Resistor type spark plug with 4000 ohm resistance to reduce electrical noise
• Ceramic mid-projection insulator for optimal heat dissipation
• Pre-gapped to 0.050 inches (1.30 mm) for precise ignition timing
• 16 mm (5/8 inch) hex size for easy installation
• Tapered seat type with 14 mm thread diameter and 0.679 inch (17.0 mm) reach

About the Autolite Double Platinum Spark Plug Line

The Double Platinum Spark Plug line from Autolite features spark plugs with platinum on both the center and ground electrode tips. This design enhances electrode durability and maintains consistent spark performance over time. The APP105 model benefits from this technology, providing reliable ignition for secondary ignition systems in various Chevrolet, Ford, Mazda, and Mercury models.

Technical Details and Application

The APP105 spark plug incorporates a tapered ground electrode with a nickel core and platinum tip, paired with a platinum center electrode core and tip. This combination ensures stable spark delivery and resistance to electrode wear. The ceramic insulator with mid-projection design supports effective heat management, reducing the risk of fouling. The resistor type with 4000 ohm resistance helps minimize radio frequency interference, protecting vehicle electronics.

Compatible Vehicles and Common Use Cases

• Chevrolet Silverado 1500 and Aerostar ignition maintenance
• Ford Mustang, Explorer, and Ranger spark plug replacement
• Mazda B4000 and Mercury Cougar ignition system upkeep
• Resolving misfires and rough idling in compatible models
• Improving cold start performance and fuel efficiency

Installation Notes and Tips

Ensure the spark plug gap is set to the factory specification of 0.050 inches (1.30 mm) before installation. Use a 16 mm (5/8 inch) socket wrench for proper torque application. The tapered seat design requires careful threading to avoid cross-threading. It is recommended to inspect the ignition system and replace spark plugs in sets for optimal engine performance.

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet OEM standards for fit, form, and function. The APP105 model undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details may vary, Autolite products typically include coverage against manufacturing defects. Consult product documentation for exact warranty terms.