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Understanding Spark Plugs

• Spark Plug Type
• Understanding Spark Plug Sizes
• Spark Plug Tip Diagnosis
• Understanding Spark Plug Heat Ranges
• Understanding Autolite Spark Plug Numbering System
• Torque Specifications
• Heat Range Facts
• Half Thread/Full Thread Explanation
• Decimal and Metric Conversion Table
• Autolite Copper Core Spark Plug Attributes
• Understanding VIN Codes
• Autolite Double Platinum Spark Plug Attributes
• Racing Cross-Reference Chart
• Original Equipment Platinum Spark Plug Applications
• Spark Plug Cross Reference
• Racing/High Performance Spark Plug: Heat Range Facts

Technical Bulletins and Installation Instructions

• Spark Plug Installation and Service Suggestion
• Autolite Disclaimer of Liability
• Understanding the Magunson Moss Warranty Improvement Act
• Principal Applications & Specifications
• Passenger Cars & Light Trucks 2005 - 1990
• Passenger Cars & Light Trucks 1989 - 1950
• Recreational Vehicles - Motorcycles
• Commercial Equipment - Lift Trucks
• Small Engine - Power Equipment Engines