Autolite AR25 Racing Spark Plug, Pack of 1

• Replacement racing spark plug used by many professional car drivers
• Specifically designed colder than the factory plug to handle added power
• Contains an Yttrium-enhanced alloy to enable up to 8% reduction in sidewire temperature for improved durability and less pre-ignition
• Features cut back ground electrode for improved ignitability of flame kernel
• Coated in an anti-corrosive nickel plating to prevent rusting

Autolite Replacement Racing Spark Plugs are used by many professional race car drivers. These spark plugs contain an Yttrium-Enhanced Alloy, which enables up to 8% reduction in side wire temperature for improved durability and less pre-ignition. Autolite racing plugs are available in colder heat ranges than most plug manufacturers to support modified engines and feature a cut background electrode for improved ignitibility, and faster flame kernel growth. They are also nickel plated for a long lasting, corrosion resistant finish.