Autolite AR52 Racing Spark Plug

The Autolite AR52 is a high-performance racing spark plug engineered for demanding motorsports applications. Designed for engines that operate at high RPM and extreme temperatures, this plug delivers reliable ignition performance when it matters most.

Key Features:

• Cut-back ground electrode design improves flame kernel development and reduces quenching for more complete combustion
• Large ground electrode provides superior heat transfer to prevent pre-ignition and detonation
• Anti-corrosive nickel plating resists oxidation and extends plug life in harsh racing environments
• Copper core center electrode for excellent thermal conductivity and heat dissipation
• Projected core nose tip positions the spark deeper in the combustion chamber for improved ignitability
• Non-resistor design for maximum spark energy in magneto-equipped racing engines

The AR52 features a 14mm thread diameter with a gasket seat and is ideal for racing applications including circle track, drag racing, and high-performance street engines. Each package contains one spark plug. Popular replacement for engines requiring a colder heat range plug to prevent overheating under sustained high-load conditions.